*Waterproof full grain leather and mesh upper *Protective and abrasion resistant rubber toe cap *Heavy-duty waterproof YKK zipper for easy on and off *Waterproof membrane seals out water and lets moisture escape *200 grams synthetic lightweight low bulk insulation for warmth and comfort *Recycled fleece lining *Recycled mesh footbed cover *Cleansport NXT & trade; treated for natural odor control *SOLARCORE® Aerogel insole provides underfoot superior warmth while being extremely flexible and ultra-thin *5% recycled PU removable footbed *Merrell Air Cushion in the heel absorbs shock and adds stability *Molded nylon arch shank *Super Rebound Compound midsole provides durable shock absorption to help reduce torque and allow for a smooth transition into the midfoot *Vibram Arctic Grip All Terrain outsole designed to effectively extend the winter traction season due to the enhanced durability and versatility *Vibram XS Trek Evo outsole designed to provide optimal balance of traction and flexibility on wet surfaces