The bag is made from tough PVC Coated Mesh that is re-enforced for strength and UV protected.
Capacity: 4.Each bag comes with a removable shoulder strap that can be stored in the bags zippered side pocket when not in use.3 cu ft;Dimensions: 36 L x 16 W x 13 H;100% Waterproof with welded seams, urethane coated zippers, and a hook-&-loop-close zipper cover;Designed to be used on any size vehicle, WITH or WITHOUT a roof rack;Includes: bag, shoulder strap, (2) attachment straps, (4) Car Clips, and set up guide;California Residents: WARNING Attach (1) to (4) Duffle Bags to vehicles WITH or WITHOUT a roof rack.