Composite Toe: left and right asymmetrical, non-metallic composite, carbon-fiber safety toes offer unobtrusive fit and are 15% lighter than steel toes, and meet or exceed ASTM F2412 and F2413 EH standards Fit & DESIGN: built on a specific women's last (form) that is wider than the Industry Norm for improved fit and comfort; sizes listed are women’s and fit true to size; includes a removable, Dual-Density polyaer PU insole with Aerated pillow-top cushioning Waterproof: keen.Dry is a waterproof, breathable membrane liner that lets vapor out without letting water in for keeping your feet dry and comfortable; this boot does have a liner that integrates with the waterproof membrane Traction: oil- and Slip-Resistant, Non-Marking, siped, rubber outsoles for improved traction 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