Safety: Secondary protection against incidental contact with electrical circuits of 18,000 volts or less under dry conditions Meets ASTM F2892-18 EH standards Design: Storm Defender® waterproof breathable membrane keeps feet dry even in heavy rains, but also lets feet breathe Oil-tanned leather Lace closure In-Shoe Comfort: Thick, cushioned and polyurethane insole for support and shock absorbance FastDry® lining wicks sweat and fights odors Durability and Traction: Dual-density rubber outsole with Goodyear® welt construction