Premium waterproof full grain leather upper; 400G Thinsulate insulation adds warmth; Breathable waterproof membrane with moisture wicking mesh lining; Removable HyperRest performance comfort footbed cushions and supports foot to reduce pain and fight fatigue; Advanced comfort and protection from PU midsole; TPU SR Lug outsole that is 3x more abrasion resistant than traditional rubber; Durable direct-attach construction; Nylon shank for lightweight support; 1.92 lbs per boot based on safety-toe style