This bag WONT sag, even when its filled with 36 cans. The unique light-weight bottom mold will take care of that problem! * Product Material: 600D Polyester * Product Weight: 2 lbs. * The cooler is surrounded with thick, insulated padding to keep drinks cold. * Also features a top zip for easy access, dual handles and detachable shoulder strap. * Made of 600D polyester with heat sealed PEVA lining and EVA molded bottom.