Introducing the 5 Layer Insulated Backpack Cooler with Waterproof Air Sealed Zipperless Lid from the Quiksilver Coastal Collection. The Coastal Backpack Cooler Keeps Food and Drinks Cold for Up to 72 Hours, achieve the best cooling when using Ice Packs! The 600D Nylon and 420D Polyether Tpu Lining Material allows for easy cleaning inside and outside the bag. With 5 Layers of Adavanced Insulation, including Waterproof Pvc, 25mm Epe Foam, and Food Grade Materials. Air Sealed Zipperless Lid and Mesh Pockets to prevent any leaks. Cushioned Backpack to allow Airflow and prevent sweating when carrying. Multiple Command Hooks on all sides of the bag and a Built-In Bottle Opener.