The Asolo TPS 520 GTX combines a durable and supportive full grain leather upper with an exclusive chassis developed with Vibram, offering a dual density polyurethane midsole for long term cushion. Gore Tex lined and seam sealed for all weather, all conditions hiking. Exclusive midsole uses low density polyurethane surrounded by high density polyurethane for shock absorbtion and durability Co partnered Vibram outsole with Aso brake, designed for confident downhill traction Asoflex plate provides twisting resistance for ankle support Gore Tex lined seam sealed upper Avg. Wt. 3lbs, 5oz.