Features of the Oboz Women's Bridger 9IN insulated B-Dry Boot Upper - Waterproof all leather Upper, Oboz B-DRY waterproof/breathable membrane, molded rubber toe cap and heel kick, recycled lining material, gaiter D-ring Insulation - 400 gram 3M Thinsulate Insole - O Fit Insole Thermal Midsole - Single-Density EVA, TPU chassis, nylon shank Outsole - Granite Peak with winterized rubber Heel Rise - 15mm.