Star Wars The Mandalorian Mythosaur Skull Cooler Backpack The options are endless with the PTX Backpack Cooler, a spacious and fully-insulated backpack cooler with a 20-can capacity water-resistant interior, padded, adjustable backpack straps, and numerous pockets for all your doodads. This versatile travel bag has an exterior stretch cargo cord which is perfect for jackets or securing base/mid layers to dry out before sundown. This backpack cooler includes an attachment harness for golf carts and serves as the best caddy you'll ever encounter! Item cannot be shipped to P.O. Boxes