Come to the rescue of your drink-deprived friends with the Cooler Tube from Mountainsmith, a six-pack cooler you can wear on your back. This insulated tube is made from durable ripstop polyester so it can handle all the bumps and bruises of your latest river adventure. The PEVA lining is seam-sealed and waterproof in order to protect your precious cargo. PE foam insulation helps to keep said cargo cool, and the adjustable shoulder sling can be easily adjusted for your comfort.