The ICEMULE Classic™ Medium Cooler has a 15-liter capacity. Made with MuleSkinET™ & MuleSkinEV™ for a rugged tough & sturdy material along with PolarLayer™ Insulation which helps keep your contents nice and cold. A special feature is the IM Airvalve™ which allows air to be added to the insulation layer for increased insulating capability and also allows you to remove the air for easy storage. Featuring no zippers, comfortable strap for crossbody, floats, retains ice for 24 hours, welded seams to prevent leaks and 100% waterproof. The ICEMULE Classic™ Medium Cooler is ideal for those afternoon hikes or a day at the beach.