Just open the air valve to inflate. The ultra-high-performance air-and-foam insulation keeps ice up to 2.5 days while holding 30 12-ounce cans. The removable, seamless liner with Microban protects against leaks and bacterial odors. It not only floats, but is water-resistant with a zippered front pocket and adjustable shoulder strap. After use, deflate and store rolled or flat. Be sure to include on your tailgate checklist!