This classic mountain boot has been designed to reflect the latest technology in hiking and backpacking footwear. The SL M3 uses the Vibram M3 sole—a lighter, more flexible and cushioned dual-density construction with a very aggressive lug pattern for ultimate traction. The upper is made from Sherpa HS12, a premium leather designed for durability and water resistance. Built on the proven BX hiking boot last, the sculpted cuff and internal padding give unsurpassed comfort and fit. Also available in wide sizes. SL M3 UPPER: Sherpa Nubuck HS12 Leather SOLE: Vibram M3 LINING: Cambrelle WEIGHT: 1.75 kg (3 lb 14 oz) size 42 pair MIDSOLE: Nylon Performance Flex SIZES: 36-46, 47, 48, 49, 50