Kamik - Stronghold (Dark Brown) - Men's: 11" high boot. Full grain leather upper. Seal sealed waterproof construction specially treated leather and upper materials. From the inside to keep water from entering membranes, waterproof tapes or sealants are applied to all seamed areas. Removable 8mm Zylex lining, a time-tested blend of materials that efficiently work together to keep feet warmer, drier and more comfortable. Bungee lace snow collar. Cast eyelets and ankle hook. Gusset tongue. Removable footbed with anitbacterial lining that is safe, effective and durable, and always maintains a hostile environment for odor-causing bacterial growth. Airstrip shock absorbing EVA molded midsole is part of Kamik's "dual density" molding technology which acts as a shock absorber to the body. The Airstrip layer is light and air-injected for cushioning. Triumph rubber outsole. Temperature rated: -40F/-40C.