Superior insulation qualities give you long lasting performance, enabling you to keep colder longer. The Polar Bear Original Nylon 24 Pack Soft Cooler will keep ice frozen for 24+ hours in 100+ degree heat and is guaranteed to be leak proof and sweat proof. FDA food-grade antimicrobial TPU coated nylon liner – consumer safe for perishable storage. 1″ thick high-density insulation. YKK #10 heavy-duty zipper. 18″ x 12″ x 10″