The evolution of one of Merrells most successful winter boot franchises ever.The waterproof construction and and Vibram Arctic Grip underfoot with keep you dry and deliver traction in any conditions mother nature can throw at you.With 200 grams of insulation and a fleece lining your feet will stay warm when the temperatures dip.Features and Benefits:- Waterproof membrane seals out water and lets moisture escape.- Waterproof full grain leather and mesh upper.- Metal Hook and 100% recycled laces and webbing.- Bellows tongue keeps out debris.- Protective and abrasion resistant rubber toe cap.- 100% recycled fleece lining.- 200 grams synthetic lightweight, low bulk insulation for warmth and comfort.- SOLARCORE® Aerogel insole provides underfoot superior warmth while being extremely flexible and ultra-thin.- 100% recycled mesh footbed cover.- Cleansport NXT™ treated for natural odor control.- 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.Insole material:SOLARCORE® Aerogel.