With a 1000 denier exterior tarpaulin fabric, seams rated to 65 pounds, and a padded, ventilated backpack strap system, this is absolutely the world's most portable HIGH-CAPACITY, high-performance cooler. It features a foolproof seal to keep ice in and air out. A tough 1000 denier outer layer provides for exceptional strength and durability. A heavy-duty inner layer is 2X thicker than most soft coolers. Reinforced back-straps plus ventilated back pads provide ultimate comfort for long-range excursions. PolarLayerTM Insulation keeps ice intact and contents Ice Mule Cold for up to 24 hours. IM AirValveTM allows for insulation layer air removal so the cooler can roll up for storage in its stuff sack. In gray. 17" H x 14" W x 11" D (when closed), 20 liters capacity = 18 cans plus ice. Made in USA.