200 grams synthetic lightweight, low bulk insulation for warmth and comfort. Complete with Solarcore® Aerogel insole provides underfoot superior warmth while being extremely flexible and ultra-thin.Waterproofing: Waterproof full grain leather upper, complete with a waterproof membrane seals out water and lets moisture escape.Traction: Vibram® Arctic Grip™ All Terrain outsole designed to effectively extend the winter traction season, due to the enhanced durability and versatility.Comfort Features:• Double stretch gore for easy on and off• Protective and abrasion resistant rubber toe cap• Cleansport NXT™ 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
