Toe protection: left and right asymmetrical aluminum safety toes weigh 35% less Than steel, and meet or exceed ASTM F2412 and F2413 EH standards Keen.Dry: a waterproof, breathable membrane that lets vapor out without letting water in for keeping your feet dry and comfortable Traction: oil- and Slip-Resistant, Non-Marking, rubber, siped outsoles that meet or exceed ASTM f1677-96 and F2913 SATRA standards Underfoot protection: Electrical Hazard (eh)-rated footwear provides a secondary source of protection incase accidentally coming into contact with live Electrical circuits Support & comfort: keen.Key-tech flex: contoured underfoot support provides structured stability and comfort with enhanced flexibility