Car Accessories & Parts

Curated picks

Rooftop Cargo Bags

A soft waterproof roof bag that adds packing space for trips

A rooftop cargo bag is a soft, waterproof bag that straps to your roof or roof rack to create extra luggage space. It is a cheaper, foldable alternative to a hard roof box, so it stores flat when you are not using it. It is great for vacations, moving day, and any time the trunk is already full.

We gather a range of options on Amazon so you can compare sizes, materials, and mounting styles. Look for a genuinely waterproof construction with sealed or covered zippers, sturdy straps, and a non-slip mat option for bare roofs. Check the capacity in cubic feet and confirm it suits whether you have crossbars.

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Popular rooftop cargo bags

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What to look for

  • Truly waterproof material and zippers
  • Fits with or without crossbars
  • Capacity in cubic feet
  • Strong straps and buckles
  • Folds flat for storage

FAQ

Do I need a roof rack?
Some bags strap to crossbars, while others use straps that pass through the door openings for bare roofs. Check the listing. A protective mat helps prevent scratches when mounting directly on the roof surface.
Are they actually waterproof?
Quality bags use coated fabric and a zipper flap or rain cover, which handles most weather well. No soft bag is guaranteed perfectly sealed, so pack items in plastic bags as a backup and follow the included care guidance.
Will it affect my driving?
A loaded bag adds height and wind resistance, which can raise fuel use and noise. Drive a little slower, watch low clearances like garages, and stay within any roof load limit listed in your vehicle manual.