Drive with Ease · waterproof roof bags, with or without a rack

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  • Asinking 840D Roof Bag, 21 Cu Ft
  • Asinking 840D Roof Bag, 21 Cu Ft — view 2
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  • Asinking 840D Roof Bag, 21 Cu Ft — view 4
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  • Asinking 840D Roof Bag, 21 Cu Ft — view 7

The one over 3,000 drivers wrote about

Asinking 840D Roof Bag, 21 Cu Ft

4.2 · 3,395 shopper reviews

Size
21 cu ft
Color
Black

$71.99price seen September 27, 2026

Our most-reviewed bag, and the one most people start with. It's 840D champion-grade PVC with triple-welded seams and a zipper buried under 6-inch Velcro flaps. It takes 21 cubic feet of whatever the trip needs, from suitcases to blankets to tents.

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  • 840D abrasion-resistant PVC with triple-reinforced welded seams.
  • 6-inch Velcro flaps fold over the zipper for 'zero leakage' in a downpour.
  • 8 thickened adjustable straps, 6 padded door hooks and 2 extra luggage straps.
  • Anti-slip mat, luggage lock and storage bag in the box.
840D 21 Cu Ft — flaps over the zipper

Flaps over the zipper

Zippers are where water gets in. We cover ours with a 6-inch Velcro flap so rain runs over the seam instead of into it.

840D 21 Cu Ft — holds its shape

Holds its shape

Even packed with odd shapes, like a folded tent next to a hard suitcase, the walls stand up instead of slumping into the wind.

Spec sheet

Capacity
21 cubic feet
Material
840D PVC fabric
Seams
Triple-reinforced, welded
Zipper cover
6-inch Velcro flaps
Straps
8 adjustable + 2 extra
In the box
Bag, storage bag, mat, 6 hooks, 2 straps, lock

Questions from the road

840D or 900D, what's the difference?

900D is a denser weave used in our Ultimate Series; 840D is lighter and still fully waterproof with welded seams.

Is there a 16 cubic foot version?

Yes, the same bag comes in 16 cubic feet for smaller roofs.

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