Asinking Car Rooftop Cargo Carrier Bag 21 Cubic feet Waterproof Car Roof Top Bag for All Cars with/Without Rack, Includes Anti-Slip Mat, 10 Reinforced Straps, 6 Door Hooks, Luggage Lock

Why it's worth it

The Asinking bundles 900D PVC with welded seams, ten straps, six hooks, a non-slip mat and a luggage lock. It's the thickest shell material here, and owners have taken it thousands of miles without trouble.

Nothing else here arrives this complete. Mat, lock, six hooks, ten straps, storage sack — all in the box. With most bags you end up ordering a mat separately and a cable lock after that, so the bundle genuinely saves you a couple of purchases and a week of waiting.

The shell is 900D PVC tarpaulin, the heaviest gauge in this group, with every seam joined by high-frequency welding rather than stitching. Owners report cross-country runs — 3,000-plus miles, Colorado winters, Denver to Moab loaded with four large duffels — with the bag quiet and dry at the end. One owner with a rack-free Pontiac ran the hooks under the weather stripping as instructed and had no issues.

From our review of 6 waterproof roof cargo bags, by Ben Carter, Tech Editor

What we like

• +Nothing else here arrives this complete
• +The shell is 900D PVC tarpaulin, the heaviest gauge in this group, with every seam joined by high-frequency welding rather than…
• +There's a real caution in the owner feedback, though
• +At 52 by 40 by 18 inches it's a large footprint, same as our top pick

What to know

• –The reliability picture is more mixed than the raw enthusiasm suggests
• –Loading and unloading is a two-person job at this size, and owners say so plainly
• –Measure first. On a compact car, 52 inches of bag on a 45-inch roof means it overhangs the windshield or the hatch, neither of…