Carhartt Welt Waterproof 10" Nano Composite Toe Pull-On Boot NWT Oil-tanned leather with suede leather shaft Storm Defender® waterproof breathable membrane keeps feet dry, but lets them breathe FastDry® lining wicks sweat and fights odors Carbon Nano toe protects against impact and compression hazards while being lighter than traditional safety toe protection; Meets ASTM 2413-18 standards Insite® technology footbed engineered with maximum arch support to reduce foot fatigue Goodyear welt-constructed rubber outsole Secondary protection against incidental contact with electrical circuits of 18,000 volts or less under dry conditions; Meets ASTM 2413-18 electrical hazard standards CMP1453