This Drake 18 Pack Cooler is a necessity. PVC backed 1200 Denier polyester for the highest quality. Ideal for using in the woods or even at the beach! On the inside there are 2 waterproof liners reducing the possibilty of leaks. It is a square-shaped, thermally controlled bag that is perfect for carrying anything from cold drinks to warm food. It also has an adjustable shoulder strap to make carrying it more comfortable.