Features of the The North Face Women's Sierra Knit WP Boot Upper: Combination of waterproof, full-grain leather and an engineered ribbed knit Sock-bootie construction can be worn up or rolled down for additional versatility Waterproof, seam-sealed construction 100 g synthetic Insulation OrthoLite sockliner Sole Unit: Single-Density, molded-EVA Midsole Rubber wrap in the toe for additional durability and protection Surface Control rubber Outsole optimized for winter conditions Approximate Weight (1/2 pair): 12.67 oz (358.7 g)