This Epic Series Boot represents the newest advancement in a technical, light weight expedition worthy boot. We have shaved grams: improved the grip; expanded the toe box for a more comfortable fit and toughened the shell to give the ultimate in comfort and performance. With Icepaw pads that improve grip on ice, and our Arcticflex compound in the shell to provide tough cold weather flexibility, the Epic has it all. Cold rated to -60 in active use, this boot will take on the toughest winter activity. Features: Outsole: TPR rubber Midsole: N/A Base: TPR rubber Liner: Multi-layer inner boot system Insole: Base and liner provide support Upper: Pro-tech microfiber and rip-stop nylon Fastening System: N/A