Design: Seam-sealed waterproof PU coated leather upper with padded collar and tongue Moisture wicking lining In-Shoe Comfort: 200g of 200B 3M(TM) Thinsulate(TM) insulation to keep you comfortable down to -40degF Removable comfort EVA insole with natural and non-toxic odor-eliminating Cleansport NXT(TM) treatment Durability & Traction: Waterproof and flexible synthetic rubber shell DEFENDER 2 outsole offers heightened weather stability and traction Channels easily disperse snow, mud and water