The YETI Hopper Cooler is the most innovative of any portable, soft-sided cooler available. With its superior durability, high-performance cooling, and extreme portability, the Hopper is perfect for any trip or tailgating party. Its DryHide Shell is puncture-resistant, leak-proof, and sports an anti-microbial liner that resists mildew. This cooler also features ColdCell Insulation foam on the sides and bottom to ensure complete chilling of its contents. A patented HydroLok Zipper keeps the cooler watertight. The Hopper cooler is made of materials that come from a variety of places such as hazmat suits and high performance whitewater rafts, making it the premier choice for travelers. Backed by the Yeti 3-year warranty. Available in three sizes: 20, 30, and 40.