The M-9 Extreme is constructed with a waterproof full-grain leather. Features GORE-TEX® waterproof breathable membrane lining, 600 gram Thinsulate Ultra Insulation, a removable full-cushioned footbed, a molded bi-fit insole for stability in the arch and heel and flexibility in the front, a PU Midsole, a Wolverine Vibram Mutant Rubber Lug Outsole, cement construction and a nylon shank.
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