Our fully-insulated Cooler Backpack is made from 4CP Poly with tarpaulin lining. It has durable, waterproof zippers and nylon webbing as well as straps that are padded with scuba foam to help cushion the weight of ice and drinks while toting it around. Perfect for a picnic in the park! Lay out your spread on the Picnic Pal and keep your beverage handy with the Hang Cool while you get your snack on!