The Blacktail boot features Wolverine's EPX technology that brings comfort closer to the foot and helps fight fatigue. Waterproof Plus breathable membrane combined with 600 grams of Thinsulate Ultra insulation ensures feet stay dry and warm. The Blacktail EPX 8'' Insulated Boots also feature: Full-grain leather upper, moisture wicking mesh lining, 600g Thinsulate Ultra insulation, removable dual-density PU EPX anti-fatigue footbed, ultra-light compression molded EVA midsole, Vibram rubber lug outsole and Goodyear welt construction with leather welt. Material: Leather, Rubber.