IceMule Coolers are a highly versatile, leakproof soft cooler that combines the portability of a backpack with the performance of a hard cooler. Now made with new and improved materials and construction this is an everyday cooler designed to be as tough and high-performance as technical outdoor gear that can cost much more. IceMule Coolers feature 4 ways to ensure superior insulation; (1) TriFold DriTop™ System, foolproof seal to keep ice in and air out, (2) MuleSkinEV™ Tough Inner and Outer layers; 2X thicker than most soft coolers, (3) PolarLayer™ Insulation, keeps contents “IceMule Cold” for up to 24 hours and (4) IM AirValve™, allows for insulation layer air removal so the coller can roll up for storage in its stuff sack. This medium sized cooler measures 12" diameter x 16" tall and can hold up to 18 cans plus ice or 6 bottles of wine plus ice. IceMule Coolers the world's most portable high-performance coolers!