The evolution of one of Merrell®'s most successful winter moc 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. Waterproof membrane seals out water and lets moisture escape Waterproof full grain leather upper Heavy-duty, Waterproof, YKK zipper for easy on and off 100% Recycled webbing Protective and abrasion resistant rubber toe cap 100% Recycled fleece lining 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 Product Features: Outsole:Vibram® Arctic Grip™ All Terrain Insole:SOLARCORE® Aerogel Lining:100% Recycled Polyester Fleece Upper:Waterproof Full Grain Leather; Mesh Weight:Half pair: 1 lb. 4.8 oz. (590 g) Insulation:200 g Synthetic Footbed:Polyurethane, removable, with 100% Recycled Mesh cover; Merrell Air Cushion in the heel Midsole:Super Rebound Compound provides durable shock absorption to help reduce torque Support (shank):Molded Nylon Arch Toe Protection:Molded Rubber Insert:Waterproof, breathable membrane Merrell Men's ColdPack 3 Thermo Tall Zip Waterproof Boot