MADE FOR: Winter TRAIL TYPE: Everyday A versatile winter boot to keep you dry and delivers traction in any conditions mother nature can throw at you. INSULATION RATING: Warm Warmer Warmest Waterproof exteriors and 200 grams of insulation will keep you dry and warm for your typical cold-weather winter activities. 200G Synthetic Insulation Waterproof VibramA(R) Arctic Grip(TM) WEIGHT PER SHOE: 1 lb 4.8 oz 200 grams synthetic lightweight, low bulk insulation for warmth and comfort. Complete with SOLARCOREA(R) Aerogel insole provides underfoot superior warmth while being extremely flexible and ultra-thin Waterproof full grain leather upper, complete with a waterproof membrane seals out water and lets moisture escape VibramA(R) Arctic Grip(TM) All Terrain outsole designed to effectively extend the winter traction season, due to the enhanced durability and versatility Heavy-duty, Waterproof, YKK zipper for easy on and off Protective and abrasion resistant rubber toe cap Cleansport NXT(TM) treated for natural odor control 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 Waterproof full grain leather and mesh upper 100% recycled webbing 100% recycled fleece lining 100% recycled mesh footbed cover 5% recycled PU removable footbed