Among these car rooftop cargo carriers, I rank the SportRack Vista XL as the best overall for shoppers who prefer a rigid box and rear access, while the WORKPRO 21-cubic-foot bag stands out for soft-sided capacity and the FIVKLEMNZ 15-cubic-foot bag for a smaller load. The main choice is between a soft bag that can be stored compactly and a hard box that holds its shape and can be easier to access. Capacity alone does not determine fit: roof limits, rack compatibility, attachment points, and vehicle clearance matter just as much. Weather protection and installation effort also vary across soft carriers, so a waterproof claim is not a substitute for careful loading and secure mounting. Read on for the full comparison and help matching a carrier to your vehicle and trip.
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Key Takeaways
- The SportRack Vista XL is the lineup’s hard-box outlier: its rear-opening design gives buyers an alternative to the soft bags that make up most of this group.
- Capacity spans compact 15-cubic-foot bags to larger 30-cubic-foot options: the bigger figures suit bulky loads, but they do not remove roof-load or fit limits.
- Several brands offer near-duplicate capacity choices: compare mounting hardware, stated construction, and vehicle compatibility rather than choosing by cubic feet alone.
- Soft bags prioritize stowability: they can be a practical choice for occasional trips or limited storage space, while a rigid box keeps its form when not fully packed.
- Waterproofing and ease of access are different needs: buyers carrying weather-sensitive gear should inspect closure and mounting details, while frequent access may favor a rear-opening box.
| Sailnovo 20-Cubic-Foot Rooftop Cargo Carrier Bag |  | Best for Rack-Free Flexibility | Capacity: 20 cubic feet | Dimensions: 51 x 39 x 17 inches | Weight: 8.3 pounds | VIEW LATEST PRICE | See Our Full Breakdown |
| FIVKLEMNZ Waterproof Rooftop Cargo Carrier Bag, 15 cu ft |  | Best for Wet-Weather Basics | Capacity: 15 cubic feet | Dimensions: 46 x 34 x 17 inches | Weight: 6.6 pounds | VIEW LATEST PRICE | See Our Full Breakdown |
| WORKPRO Waterproof Rooftop Cargo Carrier Bag, 21 Cubic Feet |  | Best for Balanced Capacity | Capacity: 21 cubic feet | Dimensions: 52 x 40 x 17 inches | Material: 840D PVC | VIEW LATEST PRICE | See Our Full Breakdown |
| FIVKLEMNZ 30-Cubic-Foot Waterproof Soft Rooftop Cargo Carrier |  | Best for Maximum Soft-Bag Capacity | Capacity: 30 cubic feet | Dimensions: 60 x 43 x 20 inches | Weight: 5.44 kg | VIEW LATEST PRICE | See Our Full Breakdown |
| RoofPax XXL 28 cu. ft. Waterproof Rooftop Cargo Carrier Bag |  | Best for Long-Term Fabric Coverage | Capacity: 28 cubic feet | Dimensions: 52 x 39.37 x 24 inches | Weight: 6.75 kg | VIEW LATEST PRICE | See Our Full Breakdown |
| Asinking 21-Cubic-Foot Waterproof Rooftop Cargo Carrier Bag |  | Best for Maximum Flexible Capacity | Capacity: 21 cubic feet | Dimensions: 52 x 40 x 18 inches | Material: 900D PVC tarpaulin | VIEW LATEST PRICE | See Our Full Breakdown |
| Asinking 15-Cubic-Foot Waterproof Car Rooftop Cargo Carrier Bag |  | Best for a Smaller, Accessory-Rich Setup | Capacity: 15 cubic feet | Dimensions: 44 x 34 x 17 inches | Material: 840D PVC | VIEW LATEST PRICE | See Our Full Breakdown |
| Asinking 21-Cubic-Foot Waterproof Rooftop Cargo Carrier Bag |  | Best for a High-Capacity Rack-Free Fit | Capacity: 21 cubic feet | Dimensions: 52 x 40 x 18 inches | Material: 840D PVC | VIEW LATEST PRICE | See Our Full Breakdown |
| Asinking 20-Cubic-Foot Waterproof Rooftop Cargo Carrier Bag |  | Best for Specified Water-Resistance Protection | Capacity: 20 cubic feet | Dimensions: 40 x 52 inches | Material: 900D double-coated PVC laminated tarpaulin | VIEW LATEST PRICE | See Our Full Breakdown |
| MIKKUPPA Car Rooftop Cargo Carrier, 15 Cubic Feet, Waterproof PVC Roof Bag |  | Best for a Simple Fold-Flat Setup | Capacity: 15 cubic feet | Model number: QVM069MK | Material: Polyvinyl chloride (PVC) | VIEW LATEST PRICE | See Our Full Breakdown |
| Sailnovo 21-Cubic-Foot Waterproof Rooftop Cargo Carrier |  | Best for Flexible Roof Setups | Capacity: 21 cubic feet | Dimensions: 51.9 × 39.37 × 16.9 inches | Material: 1000D PVC tarpaulin | VIEW LATEST PRICE | See Our Full Breakdown |
| SportRack Vista XL Rear-Opening Cargo Box, Black |  | Best Hard-Shell Pick | Model: SR7018 | Capacity: 18 cubic feet (510 L) | Material: UV-resistant ABS plastic | VIEW LATEST PRICE | See Our Full Breakdown |
| AlltoAuto 21-Cubic-Foot Waterproof Rooftop Cargo Bag |  | Best for Seam Protection | Capacity: 21 cubic feet | Dimensions: 52 × 40 × 18 inches | Weight: 5.56 kg | VIEW LATEST PRICE | See Our Full Breakdown |
| FIVKLEMNZ 21-Cubic-Foot Waterproof Rooftop Cargo Bag |  | Best Lightweight 21-Cubic-Foot Bag | Capacity: 21 cubic feet | Dimensions: 52 × 40 × 18 inches | Material: 840D PVC | VIEW LATEST PRICE | See Our Full Breakdown |
| MIDABAO 20-Cubic-Foot Waterproof Roof Cargo Carrier |  | Best for a Simpler Strap Kit | Capacity: 20 cubic feet | Dimensions: 51.1 × 39 × 17 inches | Weight: 3.94 kg | VIEW LATEST PRICE | See Our Full Breakdown |
| car rooftop cargo carrier | Capacity | Material | Dimensions | Water resistance |
|---|---|---|---|---|
| Sailnovo 20-Cubic-Foot Rooftop | 20 cubic feet | 1000D Oxford cloth | 51 x 39 x 17 inches | Water resistant |
| FIVKLEMNZ Waterproof Rooftop C | 15 cubic feet | 840D PVC | 46 x 34 x 17 inches | Waterproof |
| WORKPRO Waterproof Rooftop Car | 21 cubic feet | 840D PVC | 52 x 40 x 17 inches | Double-layer, heat-sealed waterproof construction |
| FIVKLEMNZ 30-Cubic-Foot Waterp | 30 cubic feet | 840D PVC | 60 x 43 x 20 inches | Waterproof; welded seams and double-layer cover |
| RoofPax XXL 28 cu. ft. Waterpr | 28 cubic feet | Polyester | 52 x 39.37 x 24 inches | Waterproof |
| Asinking 21-Cubic-Foot Waterpr | 21 cubic feet | 900D PVC tarpaulin | 52 x 40 x 18 inches | Waterproof |
| Asinking 15-Cubic-Foot Waterpr | 15 cubic feet | 840D PVC | 44 x 34 x 17 inches | Waterproof |
| Asinking 21-Cubic-Foot Waterpr | 21 cubic feet | 840D PVC | 52 x 40 x 18 inches | Waterproof |
| Asinking 20-Cubic-Foot Waterpr | 20 cubic feet | 900D double-coated PVC laminated tarpaulin | 40 x 52 inches | IPX66 |
| MIKKUPPA Car Rooftop Cargo Car | 15 cubic feet | Polyvinyl chloride (PVC) | — | Waterproof |
| Sailnovo 21-Cubic-Foot Waterpr | 21 cubic feet | 1000D PVC tarpaulin | 51.9 × 39.37 × 16.9 inches | — |
| SportRack Vista XL Rear-Openin | 18 cubic feet (510 L) | UV-resistant ABS plastic | 63 × 38 × 19 inches | — |
| AlltoAuto 21-Cubic-Foot Waterp | 21 cubic feet | 840D PVC tarpaulin | 52 × 40 × 18 inches | Waterproof |
| FIVKLEMNZ 21-Cubic-Foot Waterp | 21 cubic feet | 840D PVC | 52 × 40 × 18 inches | Waterproof |
| MIDABAO 20-Cubic-Foot Waterpro | 20 cubic feet | PVC and nylon | 51.1 × 39 × 17 inches | Waterproof |
More Details on Our Top Picks
Sailnovo 20-Cubic-Foot Rooftop Cargo Carrier Bag
The Sailnovo 20-Cubic-Foot Rooftop Cargo Carrier Bag suits drivers who want roomy, fold-away storage without needing a roof rack. Its straps and door hooks support several mounting setups, while the 1000D Oxford cloth and reinforced stitching are built for travel use. Compared with the smaller FIVKLEMNZ 15 cu ft bag, Sailnovo gives you more room for bulky luggage; unlike that model’s waterproof PVC construction, Sailnovo is described as water-resistant, not waterproof. That difference matters on long wet drives. The bag packs down into its included storage sack, but it needs a reasonably full, well-shaped load to limit water pooling. Door-hook mounting also requires an exposed metal frame, and the product is not recommended over a sunroof unless used with a roof basket.
Pros:- 20 cubic feet of capacity for luggage and trip gear
- Designed to fit many vehicles with or without roof racks
- Folds into an included storage bag when not in use
- Includes extra luggage straps and door hooks
Cons:- Water-resistant coating does not provide the stated waterproof construction found on the FIVKLEMNZ 15 cu ft bag
- Door-hook mounting without a rack requires an exposed metal frame
- Needs to be filled sufficiently to help limit water pooling
Best for: Drivers who need around 20 cubic feet of flexible storage and want to mount a soft carrier on a compatible vehicle without roof rails.
Not ideal for: Drivers expecting waterproof protection in sustained rain, or owners of vehicles with sunroofs who do not have a roof basket.
- Capacity:20 cubic feet
- Dimensions:51 x 39 x 17 inches
- Weight:8.3 pounds
- Material:1000D Oxford cloth
- Water resistance:Water resistant
- Mounting:Strap mount
- Folded size:10 x 5 x 15 inches
- Warranty:1 year
Our verdict“Choose Sailnovo for adaptable, fold-away capacity, but pick a waterproof PVC option if wet-weather protection is your priority.”
FIVKLEMNZ Waterproof Rooftop Cargo Carrier Bag, 15 cu ft
The FIVKLEMNZ 15 cu ft bag prioritizes stated waterproof construction over maximum volume. Its 840D PVC, welded seams, and double-layer cover are aimed at keeping luggage drier in rain and snow than the water-resistant Sailnovo 20-Cubic-Foot bag. The tradeoff is a smaller load area: 15 cubic feet can suit a couple’s bags or overflow gear, but may fall short for a family packing bulky items. It works with or without roof racks and includes an anti-slip mat, reinforced straps, door hooks, and a luggage lock, so the kit covers several practical setup needs. Installation involves managing multiple straps and hooks, though, and the soft-sided design does not give cargo the rigid protection of a hard-shell box.
Pros:- 840D PVC, welded seams, and a double-layer cover are specified as waterproof
- Fits vehicles with or without a roof rack
- Includes an anti-slip mat, reinforced straps, door hooks, and a luggage lock
- 15 cubic feet adds useful overflow space without choosing a larger carrier
Cons:- Less capacity than the Sailnovo 20 cu ft and WORKPRO 21 cu ft bags
- Securing multiple straps and door hooks adds setup steps
- Soft construction offers less rigid cargo protection than a hard-shell carrier
Best for: Couples or small households who want a soft carrier with stated waterproof construction for luggage on wet-weather trips.
Not ideal for: Families with several bulky bags or buyers who want the larger capacity of the WORKPRO 21 cu ft or FIVKLEMNZ 30 cu ft carriers.
- Capacity:15 cubic feet
- Dimensions:46 x 34 x 17 inches
- Weight:6.6 pounds
- Material:840D PVC
- Water resistance:Waterproof
- Mounting:Roof mount; fits vehicles with or without roof racks
- Included accessories:Anti-slip mat, 8 reinforced straps, 6 door hooks, luggage lock, storage bag
- Color:Black
Our verdict“Pick this FIVKLEMNZ when wet-weather protection matters more than carrying a large load.”
WORKPRO Waterproof Rooftop Cargo Carrier Bag, 21 Cubic Feet
The WORKPRO 21 Cubic Feet bag sits between compact carriers and the very large FIVKLEMNZ 30 cu ft option. Its 840D PVC and heat-sealed, double-layer construction are specified as waterproof, while the anti-slip mat and reflective strips add practical details for securing and spotting the carrier. With room for luggage and outdoor gear, it offers more capacity than the FIVKLEMNZ 15 cu ft bag without the 30 cu ft model’s larger footprint. It is designed for vehicles with or without a luggage rack and does not require special tools. Its soft sides still leave cargo less protected from impacts than a hard box, and the maker warns that extreme weather or damage can reduce water protection. Incorrectly fitted straps can also cause tears or leaks.
Pros:- 21 cubic feet balances substantial capacity with a smaller stated volume than the FIVKLEMNZ 30 cu ft bag
- 840D PVC with heat-sealed, double-layer construction is specified as waterproof
- Includes an anti-slip mat, adjustable straps, door hooks, and reflective strips
- Designed for vehicles with or without a luggage rack and installs without special tools
Cons:- Soft sides offer less impact protection than a hard-shell carrier
- Waterproof performance may be reduced by extreme weather or damage
- Incorrect strap installation can cause tearing or leaks
Best for: Travelers who need more than compact-bag capacity but do not want to jump to an extra-large rooftop carrier.
Not ideal for: Drivers who need rigid impact protection or who cannot carefully secure and check a soft carrier’s straps.
- Capacity:21 cubic feet
- Dimensions:52 x 40 x 17 inches
- Material:840D PVC
- Water resistance:Double-layer, heat-sealed waterproof construction
- Mounting:6 door hooks; fits vehicles with or without a luggage rack
- Included components:Cargo bag, 6 safety hooks, 2 reinforced straps, storage bag, user manual, anti-slip mat
- Warranty:2 years
- Model:W114182
Our verdict“Choose WORKPRO for a mid-to-large soft carrier with useful securing accessories, provided you can install its straps carefully.”
FIVKLEMNZ 30-Cubic-Foot Waterproof Soft Rooftop Cargo Carrier
When carrying volume is the main goal, the FIVKLEMNZ 30-Cubic-Foot carrier offers the largest stated capacity among these five bags. That gives it a clear advantage over the RoofPax 28 cu ft and WORKPRO 21 cu ft models for families with bulky luggage or extra outdoor gear. Its 840D PVC, welded seams, and double-layer waterproof cover are paired with an anti-slip mat, reinforced straps, six door hooks, and a luggage lock. The broad fit claim includes vehicles with or without roof racks, but a 30-cubic-foot bag is a substantial soft load to manage and secure. It also cannot match a hard-shell carrier for rigid impact protection. Compared with the more compact FIVKLEMNZ 15 cu ft model, this is a better fit for volume-heavy trips, not minimalist packing.
Pros:- 30 cubic feet provides the most stated capacity in this group
- 840D PVC with welded seams and a double-layer cover is specified as waterproof
- Includes an anti-slip mat, reinforced straps, six door hooks, and a luggage lock
- Designed to fit vehicles with or without roof racks
Cons:- Soft-shell construction provides less rigid protection than a hard cargo box
- Its 60 x 43 x 20-inch dimensions call for ample roof space
- Large capacity can be unnecessary for drivers carrying only a few bags
Best for: Families or group travelers carrying bulky luggage who want maximum stated capacity in a soft rooftop bag.
Not ideal for: Drivers with limited roof space, smaller loads, or a preference for rigid cargo protection.
- Capacity:30 cubic feet
- Dimensions:60 x 43 x 20 inches
- Weight:5.44 kg
- Material:840D PVC
- Water resistance:Waterproof; welded seams and double-layer cover
- Mounting:Strap mount; fits vehicles with or without roof racks
- Included components:Anti-slip mat, reinforced straps, 6 door hooks, luggage lock, storage bag
- Warranty:12 months
Our verdict“Choose this FIVKLEMNZ if your priority is carrying the most gear in a soft bag and your vehicle has room for its large footprint.”
RoofPax XXL 28 cu. ft. Waterproof Rooftop Cargo Carrier Bag
The RoofPax XXL 28 cu. ft. is a strong choice for drivers who want near-maximum capacity without stepping up to the FIVKLEMNZ 30 cu ft bag. Its dual zippers and waterproof construction are paired with door-hook straps, tie-down straps, a combination lock, and a storage bag. A standout distinction is its stated coverage: the zippers and buckles have a lifetime warranty, while fabric tears are covered for five years. That may appeal to frequent travelers more than the WORKPRO 21 cu ft, which offers a two-year warranty but less capacity. RoofPax is described as designed for SUVs and larger vehicles, so it is a less natural fit for compact cars. Its polyester construction and soft-sided format also do not provide hard-shell impact protection, and folded dimensions are not supplied.
Pros:- 28 cubic feet offers more capacity than the WORKPRO 21 cu ft bag
- Waterproof construction and dual zippers are specified
- Includes door-hook straps, tie-down straps, a combination lock, and a storage bag
- Warranty covers zippers and buckles for a lifetime and fabric tears for five years
Cons:- Designed for SUVs and larger vehicles rather than compact cars
- Folded dimensions are not specified
- Soft-sided polyester construction does not provide hard-shell impact protection
Best for: SUV and larger-vehicle owners who need a high-capacity soft carrier and value the stated zipper, buckle, and fabric warranty coverage.
Not ideal for: Compact-car owners or buyers who need confirmed folded storage dimensions or rigid protection for fragile cargo.
- Capacity:28 cubic feet
- Dimensions:52 x 39.37 x 24 inches
- Weight:6.75 kg
- Material:Polyester
- Water resistance:Waterproof
- Mounting:Roof mount; designed for vehicles with or without a roof rack
- Closure:Dual zippers
- Warranty:Lifetime on zippers and buckles; 5 years on fabric tear
Our verdict“Choose RoofPax for a large soft carrier with extended stated coverage if you have an SUV or larger vehicle.”
Asinking 21-Cubic-Foot Waterproof Rooftop Cargo Carrier Bag
The 21-cubic-foot capacity gives this soft carrier room for bulky trip gear, while its 900D PVC tarpaulin and reinforced seams are aimed at keeping rain out. Its supplied non-slip mat, six security hooks, reinforced straps, and luggage lock make for a more complete setup than the MIKKUPPA 15-cubic-foot bag, which offers less room. It also fits vehicles with or without roof racks, a useful advantage for drivers without crossbars. The tradeoff is the soft shell: it cannot provide the impact protection of a hard cargo box, and the generous footprint still needs careful placement on the roof. Expect to spend time securing the multiple straps and hooks rather than simply mounting a rigid box.
Pros:- 21-cubic-foot capacity accommodates bulky trip gear
- Waterproof 900D PVC tarpaulin with reinforced seams
- Fits vehicles with or without roof racks
- Includes a non-slip mat, security hooks, lock, and storage bag
Cons:- Soft shell provides less impact protection than a hard cargo carrier
- Multiple straps and hooks take time to secure correctly
Best for: Families or road-trippers who need soft-sided storage for bulky luggage and drive a vehicle with or without roof racks.
Not ideal for: Drivers who want hard-shell impact protection or a quick, low-effort installation.
- Capacity:21 cubic feet
- Dimensions:52 x 40 x 18 inches
- Material:900D PVC tarpaulin
- Water resistance:Waterproof
- Fit:Universal; compatible with vehicles with or without roof racks
- Weight:4.71 kg
- Included accessories:Non-slip mat, six security hooks, reinforced straps, luggage lock, storage bag
- Warranty:2 years
Our verdict“Choose this Asinking if you need generous, flexible rooftop storage and accept the setup work and softer protection of a bag.”
Asinking 15-Cubic-Foot Waterproof Car Rooftop Cargo Carrier Bag
This 15-cubic-foot bag is the smaller Asinking option, making it a better match for drivers who need extra luggage space without stepping up to the 21-cubic-foot models. Its 840D PVC fabric, reinforced seams, and waterproof zipper flaps are designed to shield packed gear from wet weather. Compared with the MIKKUPPA 15-cubic-foot carrier, it includes a broader set of listed accessories: an anti-slip mat, six door hooks, two extra straps, a lock, and a storage bag. That can help buyers put together a mounting setup, though the bag still relies on careful strap placement and tension to hold its shape. Choose a larger model if the trip calls for bulky cargo; this capacity is more suited to added luggage than an entire family’s load.
Pros:- 15-cubic-foot capacity adds useful luggage space without the larger models’ footprint
- 840D PVC fabric with reinforced seams and waterproof zipper flaps
- Fits vehicles with or without roof racks
- Includes an anti-slip mat, six door hooks, extra straps, lock, and storage bag
Cons:- Soft sides need careful securing to maintain the bag’s shape
- Offers less room than the 20- and 21-cubic-foot carriers in this roundup
Best for: Couples or small families who need moderate extra luggage capacity and want mounting accessories included.
Not ideal for: Large families or travelers carrying bulky gear who are likely to fill a 15-cubic-foot bag quickly.
- Capacity:15 cubic feet
- Dimensions:44 x 34 x 17 inches
- Material:840D PVC
- Water resistance:Waterproof
- Fit:Universal; vehicles with or without roof racks
- Weight:3.99 kg
- Included components:Storage bag, anti-slip mat, six door hooks, two extra straps, luggage lock
- Warranty:2 years
Our verdict“Pick this model for a moderate load and a useful accessory bundle, but choose a larger carrier for bulky or family-sized cargo.”
Asinking 21-Cubic-Foot Waterproof Rooftop Cargo Carrier Bag
With 21 cubic feet of capacity and a stated fit for vehicles with or without roof racks, this Asinking bag suits drivers who need substantial storage but do not have crossbars. Its 840D PVC, reinforced welded seams, and zipper with protective flaps are built around weather protection, while six padded door hooks, adjustable straps, and an anti-slip mat supply the main mounting pieces. Compared with the 20-cubic-foot Asinking model, this one offers a little more listed capacity and six hooks rather than four, though the other model specifies double-coated PVC tarpaulin and IPX66 water resistance. The setup here still depends on managing several straps and door hooks, and the soft shell is less protective against impacts than a hard box.
Pros:- 21-cubic-foot capacity for bulky luggage
- 840D PVC construction with reinforced welded seams and zipper flaps
- Fits vehicles with or without roof racks
- Includes six padded door hooks, extra straps, anti-slip mat, and lock
Cons:- Requires several straps and door hooks to mount
- Soft-shell construction offers less impact protection than a hard cargo box
Best for: Drivers without roof racks who need high-capacity soft storage and want multiple door hooks included.
Not ideal for: Buyers who prioritize a hard shell or prefer a simpler mounting process with fewer straps and hooks.
- Capacity:21 cubic feet
- Dimensions:52 x 40 x 18 inches
- Material:840D PVC
- Water resistance:Waterproof
- Fit:Universal; compatible with vehicles with or without roof racks
- Weight:4.24 kg
- Closure:Zipper with protective flaps
- Included accessories:Anti-slip mat, six padded door hooks, two extra straps, storage bag, luggage lock
Our verdict“Choose this 21-cubic-foot Asinking for rack-free flexibility and roomy storage, but favor the 20-cubic-foot model if its specified double coating and water-resistance rating matter more.”
Asinking 20-Cubic-Foot Waterproof Rooftop Cargo Carrier Bag
This 20-cubic-foot bag stands out for its clearly specified IPX66 water resistance and double-coated PVC tarpaulin with heat-welded seams. A storm-flap zipper is intended to help keep rain, dirt, and road spray away from packed cargo, making this the most explicitly weather-focused choice among the two larger Asinking bags. It gives up one cubic foot compared with the 21-cubic-foot model, but its four anti-scratch door hooks may appeal to owners concerned about contact at the door frame. The universal fit works with or without roof racks, and a non-slip mat, combination lock, and storage bag are included. Like the other soft carriers, it takes careful strap-and-hook installation and cannot match a hard box for impact protection.
Pros:- Specified IPX66 water resistance
- Double-coated PVC tarpaulin with heat-welded seams and storm-flap zipper
- Fits vehicles with or without roof racks
- Includes a non-slip mat, combination lock, protective door hooks, and storage bag
Cons:- Four door hooks provide fewer mounting points than the six-hook Asinking 21-cubic-foot model
- Soft construction offers less impact protection than a hard carrier
- Straps and hooks require careful installation
Best for: Road-trippers who want a soft carrier with a stated water-resistance rating and protection against road spray.
Not ideal for: Buyers who need the maximum capacity in this lineup or want rigid impact protection from a hard-shell box.
- Capacity:20 cubic feet
- Dimensions:40 x 52 inches
- Material:900D double-coated PVC laminated tarpaulin
- Water resistance:IPX66
- Seams and closure:Heat-welded seams; storm-flap zipper
- Fit:Vehicles with or without roof racks
- Included accessories:Non-slip mat, combination lock, four anti-scratch door hooks, storage bag
- Warranty:2 years
Our verdict“Choose this model for its specified weather-protection features and broad vehicle fit, unless maximum capacity or rigid protection is your priority.”
MIKKUPPA Car Rooftop Cargo Carrier, 15 Cubic Feet, Waterproof PVC Roof Bag
The MIKKUPPA is a straightforward pick for drivers who want 15 cubic feet of extra space and a bag that folds flat for storage between trips. Its six-point strap system and anti-slip mat provide the core parts for securing it to a vehicle, and the listed fit includes cars with or without roof racks. Compared with the Asinking 15-cubic-foot bag, MIKKUPPA emphasizes a fold-flat design and a defined six-point system, while Asinking lists more included hardware such as door hooks, extra straps, and a luggage lock. That simpler package may suit buyers who want fewer extras to manage, but the six straps still all need to be used for proper security. The soft PVC shell also lacks the impact protection of a rigid rooftop box.
Pros:- 15-cubic-foot capacity for added travel luggage
- Fold-flat design stores in a compact pouch
- Six-point strap system and anti-slip mat
- Fits vehicles with or without roof racks
Cons:- All six straps must be used for proper security
- The listed package does not specify door hooks or a luggage lock
- Soft shell offers less impact protection than a hard cargo box
Best for: Drivers who want a compactly storable 15-cubic-foot bag with a defined strap system for occasional trips.
Not ideal for: Travelers who want included door hooks and a lock, or who need more capacity than a 15-cubic-foot bag provides.
- Capacity:15 cubic feet
- Model number:QVM069MK
- Material:Polyvinyl chloride (PVC)
- Shell type:Soft
- Water resistance:Waterproof
- Fit:Universal; vehicles with or without roof racks
- Mounting:Roof mount; six-point strap system
- Included features:Anti-slip mat, fold-flat storage pouch
- Color:Yellow/Black
Our verdict“Pick the MIKKUPPA for fold-flat storage and a six-point mounting system, but choose the Asinking 15-cubic-foot bag if you want more listed accessories.”
Sailnovo 21-Cubic-Foot Waterproof Rooftop Cargo Carrier
The Sailnovo 21-Cubic-Foot makes sense for buyers who want soft-bag capacity but need several mounting options: its 10 adjustable straps and six door hooks can work with crossbars, side rails, roof baskets, or some bare roofs. That flexibility gives it an edge over the SportRack Vista XL, which requires compatible crossbars, while the SportRack’s hard shell offers better protection from knocks. The Sailnovo’s 1000D PVC tarpaulin helps shield packed gear from weather, and the included anti-slip mat adds a layer between the bag and the vehicle. Still, its capacity comes with soft-bag limits: sharp cargo can puncture the material, and bare-roof setup requires liftable window weatherstripping for the hooks. It also is not suited to most vans without roof racks or vehicles with sunroofs.
Pros:- 21 cubic feet of storage for bulky luggage and trip gear
- 1000D PVC tarpaulin helps protect contents from rain, snow, wind, and dust
- Ten adjustable straps and six door hooks support several roof configurations
- Folds into the included storage bag when not in use
Cons:- Sharp items can puncture the material and create leaks
- Not suitable for vehicles with sunroofs or most vans without roof racks
- Bare-roof installation depends on being able to lift window weatherstripping for the door hooks
Best for: Drivers who need 21 cubic feet of soft-bag storage and have a roof setup that can use its straps or door hooks.
Not ideal for: Owners of vehicles with sunroofs, most vans without roof racks, or anyone carrying sharp gear that could puncture a soft carrier.
- Capacity:21 cubic feet
- Dimensions:51.9 × 39.37 × 16.9 inches
- Material:1000D PVC tarpaulin
- Straps:10 reinforced adjustable straps
- Door hooks:6
- Included accessories:Anti-slip mat, combination lock, storage bag, safety hooks, and user manual
- Compatibility:Most vehicles with crossbars, side rails, roof baskets, or suitable bare roofs
- Limitations:Not suitable for most vans without roof racks or vehicles with sunroofs
Our verdict“Choose the Sailnovo if you want a roomy soft carrier with multiple mounting options and your vehicle is compatible with its hooks or roof attachments.”
SportRack Vista XL Rear-Opening Cargo Box, Black
The SportRack Vista XL is the hard-shell choice in this group, making it a better fit than soft bags such as the AlltoAuto 21-Cubic-Foot when cargo needs a more rigid enclosure. Its 18-cubic-foot capacity is smaller than the 21-cubic-foot bags, but the UV-resistant ABS shell gives gear a sturdier barrier against bumps and handling. The rear-opening lid is useful when you want to load from the side away from passing traffic, and its tool-free mounting hardware can simplify fitting it to compatible crossbars. The tradeoff is less flexibility: it needs a suitable rack, its maximum load is 100 pounds, and buyers must check crossbar spacing and rack fit before ordering. Compared with soft carriers, it also takes up more space when stored off the vehicle.
Pros:- Rigid UV-resistant ABS construction offers more impact protection than soft bags
- Rear opening allows access from the side away from traffic
- Tool-free crossbar mounting simplifies installation and removal
- Includes a lock and has an 18-cubic-foot capacity
Cons:- Requires compatible roof racks and crossbar spacing of 23 5/8–29 3/4 inches
- Maximum weight capacity is 100 pounds
- Less storage capacity than the 21-cubic-foot soft carriers in this batch
Best for: Drivers with compatible crossbars who prefer a rigid, lockable carrier and value rear-side access over maximum soft-bag capacity.
Not ideal for: Drivers without compatible roof racks, those needing more than 18 cubic feet, or buyers who need a carrier that folds away for storage.
- Model:SR7018
- Capacity:18 cubic feet (510 L)
- Material:UV-resistant ABS plastic
- Opening:Rear
- Mounting:Tool-free crossbar mounting
- Rack compatibility:SportRack, square bars, round bars, and most factory racks
- Dimensions:63 × 38 × 19 inches
- Crossbar spacing:23 5/8–29 3/4 inches
- Maximum weight capacity:100 lb (45 kg)
Our verdict“Pick the SportRack Vista XL if your rack fits and a rigid shell matters more to you than the extra capacity and pack-away convenience of a soft carrier.”
AlltoAuto 21-Cubic-Foot Waterproof Rooftop Cargo Bag
The AlltoAuto 21-Cubic-Foot stands out among the soft carriers for its 840D PVC tarpaulin and heat-welded seams, a construction detail aimed at limiting water entry at the seams. It offers the same stated capacity as the FIVKLEMNZ bag, while adding a listed 24-month warranty; neither soft option provides the impact resistance of the hard-shell SportRack Vista XL. AlltoAuto is designed for cars and SUVs with or without roof racks and includes ten straps, six door hooks, and an anti-slip mat, giving buyers the main pieces needed to secure it. That flexibility still means a more involved setup than mounting a rigid box: the straps and hooks need careful positioning. Its soft walls also provide less protection from impacts, and the folded package is compact but not a substitute for a hard carrier.
Pros:- Heat-welded seams and waterproof PVC tarpaulin are designed to help keep water out
- 21 cubic feet accommodates luggage and camping gear
- Designed for vehicles with or without roof racks
- Includes ten straps, six door hooks, an anti-slip mat, and a storage bag
Cons:- Soft construction offers less impact protection than the SportRack Vista XL hard box
- Multiple straps and hooks require time and care to secure
- Flexible walls do not provide the structured storage of a rigid carrier
Best for: Car and SUV owners seeking a high-capacity soft bag with welded seams and a stated 24-month warranty.
Not ideal for: Drivers who want a rigid impact-resistant shell or prefer a simpler crossbar-mounted installation over arranging straps and hooks.
- Capacity:21 cubic feet
- Dimensions:52 × 40 × 18 inches
- Weight:5.56 kg
- Material:840D PVC tarpaulin
- Water resistance:Waterproof
- Fit:Cars and SUVs with or without roof racks
- Included components:10 reinforced straps, 6 door hooks, anti-slip mat, combination lock, and storage bag
- Folded size:17 × 13 × 7 inches
- Warranty:24 months
Our verdict“Choose AlltoAuto if you want a 21-cubic-foot soft bag with welded seams and a stated warranty, and are comfortable managing a multi-strap installation.”
FIVKLEMNZ 21-Cubic-Foot Waterproof Rooftop Cargo Bag
The FIVKLEMNZ 21-Cubic-Foot pairs a large stated capacity with a listed weight of 4.68 kg, making it the lighter documented option beside the AlltoAuto 21-Cubic-Foot, which weighs 5.56 kg. Both use 840D PVC and welded seams, but FIVKLEMNZ also specifies a double-layer cover to help protect cargo from rain and snow. It is designed for vehicles with or without roof racks and comes with an anti-slip mat, straps, six door hooks, a luggage lock, and a storage bag. The tradeoff is shared by the other soft bags: flexible walls provide less protection from impacts than the rigid SportRack Vista XL, and installation takes time because the straps and hooks need to be secured. Its warranty is 12 months, shorter than AlltoAuto’s stated 24 months.
Pros:- 21 cubic feet of storage in a listed 4.68 kg package
- 840D PVC, welded seams, and a double-layer cover help protect cargo from weather
- Designed to fit vehicles with or without a roof rack
- Includes an anti-slip mat, straps, six door hooks, luggage lock, and storage bag
Cons:- Soft-sided construction gives less impact protection than a hard-shell carrier
- Straps and door hooks add steps to installation
- 12-month warranty is shorter than the AlltoAuto’s listed 24-month warranty
Best for: Drivers who want a 21-cubic-foot soft carrier with a listed weight below the AlltoAuto and a double-layer cover.
Not ideal for: Buyers prioritizing a longer stated warranty, a rigid shell, or a setup without multiple straps and door hooks.
- Capacity:21 cubic feet
- Dimensions:52 × 40 × 18 inches
- Material:840D PVC
- Water resistance:Waterproof
- Fit:Vehicles with or without a roof rack
- Item weight:4.68 kg
- Included accessories:Anti-slip mat, reinforced straps, 6 door hooks, luggage lock, and storage bag
- Warranty:12 months
Our verdict“Choose FIVKLEMNZ if you want a lighter-listed 21-cubic-foot soft bag with a double-layer cover and do not need a hard shell or longer stated warranty.”
MIDABAO 20-Cubic-Foot Waterproof Roof Cargo Carrier
The MIDABAO 20-Cubic-Foot gives up one cubic foot compared with the 21-cubic-foot Sailnovo, AlltoAuto, and FIVKLEMNZ bags, but its listed six short and two long straps offer a more defined kit for securing the carrier. Its PVC-coated construction and coated zipper are intended to help keep cargo dry, and the included anti-slip mat separates the bag from the roof. Like those larger soft bags, MIDABAO fits vehicles with or without roof racks and packs into its storage bag between trips. It is a practical choice for buyers who do not need every bit of available volume, but it has fewer listed mounting accessories than the other three soft bags: no door hooks or lock are specified. And, unlike the rigid SportRack Vista XL, its flexible shell offers limited impact protection.
Pros:- 20 cubic feet of storage for luggage and trip equipment
- PVC-coated construction and coated zipper are designed to resist water
- Fits cars with or without roof racks
- Includes an anti-slip mat, six short straps, two long straps, and a storage bag
Cons:- One cubic foot less capacity than the 21-cubic-foot soft bags in this batch
- No door hooks or lock are listed among the included accessories
- Soft construction offers less impact protection than the SportRack Vista XL
Best for: Drivers who want a 20-cubic-foot soft carrier with a stated set of short and long straps and an anti-slip mat.
Not ideal for: Buyers needing the maximum capacity in this group, included door hooks or a lock, or the impact protection of a rigid box.
- Capacity:20 cubic feet
- Dimensions:51.1 × 39 × 17 inches
- Weight:3.94 kg
- Material:PVC and nylon
- Water resistance:Waterproof
- Fit:Cars with or without roof racks
- Closure:Zipper
- Included accessories:Anti-slip mat, storage bag, six short straps, and two long straps
Our verdict“Pick MIDABAO if 20 cubic feet is enough and you want a soft carrier with a specified mix of short and long straps, rather than the highest capacity or a hard shell.”
How We Picked
I compared the 15 options through the decisions that shape a rooftop purchase: usable capacity, soft-bag versus rigid-box construction, stated weather protection, mounting approach, access, and how much storage space the carrier may take when it is off the vehicle. I gave preference to products with a clear role for a particular buyer rather than treating the largest volume as an automatic win. A carrier’s advertised capacity matters only if it fits the vehicle’s roof and the items being carried.
The order reflects practical differences within this lineup. The SportRack Vista XL leads for its rigid construction and rear access, while the WORKPRO and larger soft bags serve buyers who need flexible packing volume. Smaller 15-cubic-foot bags rank as better fits for lighter loads and tighter storage needs. Where multiple options share similar capacity and a soft-bag format, I avoid claiming a meaningful performance gap without distinct details; compatibility, included attachment components, and the maker’s care instructions should decide between them.
| car rooftop cargo carrier | Water resistance | Fit |
|---|---|---|
| Sailnovo 20-Cubic-Foot Rooftop | Water resistant | — |
| FIVKLEMNZ Waterproof Rooftop C | Waterproof | — |
| WORKPRO Waterproof Rooftop Car | Double-layer, heat-sealed waterproof construction | — |
| FIVKLEMNZ 30-Cubic-Foot Waterp | Waterproof; welded seams and double-layer cover | — |
| RoofPax XXL 28 cu. ft. Waterpr | Waterproof | — |
| Asinking 21-Cubic-Foot Waterpr | Waterproof | Universal; compatible with vehicles with or without roof racks |
| Asinking 15-Cubic-Foot Waterpr | Waterproof | Universal; vehicles with or without roof racks |
| Asinking 21-Cubic-Foot Waterpr | Waterproof | Universal; compatible with vehicles with or without roof racks |
| Asinking 20-Cubic-Foot Waterpr | IPX66 | Vehicles with or without roof racks |
| MIKKUPPA Car Rooftop Cargo Car | Waterproof | Universal; vehicles with or without roof racks |
| Sailnovo 21-Cubic-Foot Waterpr | — | — |
| SportRack Vista XL Rear-Openin | — | — |
| AlltoAuto 21-Cubic-Foot Waterp | Waterproof | Cars and SUVs with or without roof racks |
| FIVKLEMNZ 21-Cubic-Foot Waterp | Waterproof | Vehicles with or without a roof rack |
| MIDABAO 20-Cubic-Foot Waterpro | Waterproof | Cars with or without roof racks |
Factors to Consider When Choosing Car Rooftop Cargo Carriers
I would choose a rooftop carrier by checking vehicle limits and trip habits before comparing capacity claims. These decisions can prevent the most common mismatch: buying a large carrier that cannot be safely fitted or is awkward for the way you travel.
Start With Your Roof’s Load Limits
Check the vehicle manual for the maximum roof load, then include the carrier, crossbars, and cargo in that total. A carrier’s capacity in cubic feet describes space, not how much weight the roof can support. Roof-load limits may differ when the vehicle is moving versus parked, so use the stated driving limit. Do not assume factory side rails alone are suitable attachment points; some carriers require crossbars or specific anchor locations. If the limits or rack setup are unclear, confirm them with the vehicle or rack manufacturer before buying. This step can rule out an oversized option before you spend time comparing bag designs.
Choose Volume Around the Shape of Your Cargo
Think through the actual items you plan to carry, including their dimensions, rather than estimating only by the number of bags. Soft carriers can flex around some irregular loads, but sharp edges may press against the material and awkward shapes can make a full bag harder to secure. A rigid box keeps a defined shape, which can help with repeatable packing but may limit what fits. Extra capacity is useful for bulky, compressible items; it is not a reason to overload the roof. A smaller bag may be easier to position and keep taut when the load is modest. Make a quick packing list before deciding that the largest advertised volume is the best match.
Match the Carrier to Your Storage Space and Trip Frequency
A soft bag is often easier to store between trips because it can be folded, while a rigid box needs a place to sit when it is not on the car. That difference matters for apartment dwellers and drivers who use rooftop storage only a few times a year. Frequent travelers may prefer a carrier that is quicker to load and mount consistently, even if it takes more room at home. Consider who will install it and whether the process is manageable without help. A bag that is simple to store may still require careful positioning and tightening each time. Weigh convenience across the whole year, not just the drive out.
Treat Weather Protection as a System
Water protection depends on more than a product label: closure design, seams, placement, loading, and how tightly the carrier is secured all matter. Keep items that cannot tolerate moisture inside separate waterproof containers, especially on long drives or in changeable weather. Avoid packing the closure so full that it cannot seal as intended. Check the maker’s instructions for care and for any limits on exposure or cleaning. A soft carrier’s flexible body may make a good fit for some loads, but it does not turn careless packing into a weatherproof setup. If the cargo is especially sensitive, choose added internal protection rather than relying on the rooftop bag alone.
Check Mounting Compatibility Before Checkout
Confirm how a carrier attaches and whether your car has compatible crossbars, rails, or other approved mounting points. Product photos can make attachment look universal even when vehicle roof layouts differ. Compare the listed installation requirements with your exact vehicle and rack configuration, including bar spacing and clearance if those details are provided. Leave room for the hatch or rear door to open, and check that the carrier will not block the driver’s view. After fitting, follow the maker’s directions for tightening and recheck the attachment during travel as directed. A capacity advantage is not useful if the carrier cannot be secured correctly to your roof.
Know When a Hard Box Is Worth the Extra Bulk
A hard box earns its place when a defined shell and convenient access matter more than compact storage. Rear-opening access, as found on the SportRack Vista XL, can be useful when the carrier sits over the front portion of the roof and the back of the vehicle remains reachable. A soft bag is the more space-conscious choice when storage at home is limited or trips are occasional. Before choosing a box, check its dimensions against your roof, garage clearance, and hatch movement. Before choosing a bag, think about the time needed to position and tighten it correctly. Paying for the format that fits your routine is more useful than paying for capacity you rarely use.
Frequently Asked Questions
Can I use a rooftop cargo carrier without crossbars?
Some soft carriers are designed to attach using approved roof points, while others require crossbars, so the answer depends on the specific model and your vehicle. Check both the carrier instructions and the vehicle manual rather than relying on a universal-fit claim. The roof surface, door seals, rails, and attachment points all affect whether a setup is permitted. Never improvise by routing straps where they could interfere with airbags, doors, or moving parts. If the instructions do not list your configuration, confirm compatibility with the manufacturer before driving.
How much cargo can I put in a rooftop carrier?
Use the vehicle’s roof-load limit as the controlling figure, subtracting the weight of the carrier and rack hardware from the allowable moving load. The carrier’s cubic-foot capacity is not a weight rating, and a spacious bag can still exceed the roof limit when filled with dense items. Spread cargo so the load is balanced and secure, following the carrier maker’s packing directions. Keep heavy belongings inside the vehicle when possible. If your manual gives different limits for different roof configurations, use the one that matches your setup.
Are soft rooftop bags suitable for long trips in rain?
A soft bag can be used for travel in wet weather when its instructions allow it, but the label alone does not guarantee that every load will stay dry. Packing, closure alignment, seam condition, and tight mounting all affect protection. Put moisture-sensitive belongings in sealed inner bags or containers as a second layer of protection. Avoid placing sharp objects against the carrier fabric, and inspect it for wear before departure. For cargo that must remain dry under demanding conditions, consider whether a rigid box or additional internal protection better fits the risk.
Should I choose a 15-cubic-foot bag or a larger carrier?
Choose the smaller capacity if your load is limited to a few soft bags and you value a less bulky carrier that is easier to position and store. A larger option makes more sense for bulky family-trip gear, provided it fits the roof and stays within the vehicle’s load limit. Do not fill unused space with heavy items just because the carrier can hold them. Measure likely cargo and compare dimensions where available; volume figures do not show whether a particular suitcase will fit through the opening. The right size is the smallest carrier that accommodates your usual load without forcing poor packing.
Is a hard cargo box better than a soft rooftop bag?
Neither format is better for every driver. A hard box, such as the rear-opening SportRack Vista XL in this roundup, keeps a rigid shape and can offer convenient access, but it takes more storage space when removed. A soft bag folds down for easier storage and can suit occasional use, though it needs careful positioning and tightening on each trip. Your roof setup and the shape of your cargo may favor one format over the other. Choose based on storage at home, how often you travel, and whether access or compact stowage matters more.
Conclusion
For most buyers who want a fixed-shape carrier and easier rear access, I recommend the SportRack Vista XL as the best overall pick. The WORKPRO 21-cubic-foot bag is my best value-style choice for shoppers who want a substantial soft carrier, while the RoofPax XXL 28-cubic-foot bag suits buyers seeking a larger soft-sided option. Beginners should start with a smaller bag such as the FIVKLEMNZ 15-cubic-foot model if it matches their load and vehicle setup, since modest capacity can be simpler to manage. For occasional trips and limited home storage, choose a foldable soft carrier; for frequent access and a rigid shape, favor the SportRack box. Before choosing any of them, confirm roof-load limits and mounting compatibility for your exact vehicle.
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