Waterproof Nubuck Leather Upper Seam Sealed Waterproof Construction Removable 9mm Zylextra®, Liner Moisture Wicking Lining Synthetic Shearling Snow Collar Rustproof D-Ring Lacing System Waterproof Leather Gusset Tongue Waterproof & Flexible Synthetic Rubber Shell Kamik&rsquo, s SNOWGRIP Synthetic Rubber Winter Outsole Height 10.25 Inch (26cm) / Weight 3.54 lbs (1606g) (per pair) Seam Sealed This technology makes boots practically impenetrable to snow & moisture without adding any extra weight to the footwear. By specially treating our leathers & nylons, then using waterproof tapes & sealants to cover every seam, it&rsquo, s like feet are wrapped in a cocoon. So they stay safe & dry. Zylextra®, Comfort rated to -58°, F/-50°, C Easy removal for washing &, drying Our proprietary Zylextra technology has four distinct layers to help keep feet warm & dry. The first layer wicks sweat away from the foot, while the next two are made up of dense felt & foam to trap body heat. The outer layer is made from a space age thermal foil that deflects cold air & reflects body heat back to the foot, providing even more warmth & moisture control. & with reinforced seams & heel guard, they&rsquo, re incredibly durable.