SPECS: Holds up to 18 cans or 5 750 ml bottles with ice Capacity: 23 L Dimensions: 14 in. x 11 in. x 17 in. Weight: 3.2 lbs. TECHNOLOGY: MuleSkinET™, an exceptionally sturdy exterior fabric, is combined with MuleSkinEV™ a tough interior layer, to create a rugged shell that protects against the elements PolarPlus™ insulation for 24+ hours ice retention The IM AirValve™ allows extra air to be added to the insulation layer, which increases the insulating capability. It also allows you to release air so that the cooler can roll up for storage FEATURES: Ergonomically designed to be carried on your back like a premium backpack Compact and portable Zipper-free roll-top closure Double-padded straps Floats while keeping water out