Waterproof Nubuck Leather + Suede Leather, 400g Freeze Guard insulation, B-DRY Waterproof membrane, Fleece lining, Molded rubber toe cap & heel kick + Gaiter D-Ring; Secondary Lace Board-Lasted O FIT Insole Thermal Single Density Compression Molded EVA Granite Peak This is our warmest women’s boot, ready for any winter adventure. 400 gram Freeze Guard insulation keeps 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, and frozen tundra.