This is our warmest, burliest boot, ready for any winter adventure. 400 grams of Thinsulate keep feet warm while a DWR nubuck leather upper with our waterproof B-DRY liner ensures to keep feet dry. Add a TPU Chassis, and the winterized Granite Peak Outsole will keep you on track come snow, ice, or frozen tundra.Upper MaterialWaterproof all Nubuck leather upper400 gram 3M™ Thinsulate™ insulationOboz B-DRY waterproof/breathable membraneMolded rubber toe cap and heel kickGaiter D-ring