These Chippewa boots have the extreme durability that you need on the job, including composite toes and waterproof protection. . . . . . Tough bark leather upper. Composite Safety Toe; rated to ASTM F2413-11 standards. ASTM electrical hazard rated. Chip-A-Tex(R) waterproof membrane keeps out water. Stabilizing steel shank. High abrasion nylon lining. Heavy duty nylon laces. Rubber midsole. Non-tarnishable hooks and eyelets. 400 g of Thinsulate(TM) insulation for greater warmth and comfort. Bontex(R) insole. Extremely durable Vibram(R) rubber outsole.