Lowa - Aspen GTX Mid (Black/Silver) - Men's: A lightweight boot with warmth and comfort for winter hiking. Abrasion-resistant split leather upper with Cordura, in combination with synthetic Nubuck. Nylon lace loops for simple, fast adjustments. GORE-TEX motion protective insulation lining that's warm, durable, and waterproof. Two different components form the midsole and provide the perfect combination of comfort, shock-absorption, and stability. Climate-control footbed. Snowgrip's sharp profile elements on the outsole provide excellent grip and traction on snow and ice. Shaft height: 4.5". Circumference: 13".