Our backpack coolers are perfect for your next day-trip or outdoor adventure. They will keep your drinks ice-cold for up to 24 hours. The IceMule Pro insulated backpack cooler straps comfortably to your back, leaving both arms free to grab your surfboard, fishing pole or any other gear your adventure calls for. Our premium, high-performance back pack coolers are waterproof, easy to clean, excellent to carry and made to last. They will not let you down on your next adventure! IceMule Pro high-performance backpack coolers come in 2 sizes - 23L. 33L - and a variety of colours.