Design: Mesh and suede leather upper surrounds the GORE-TEX waterproof lining TPU Yarn Mesh for added structure and support Mesh is partially made from recycled material Lace closure and heel loop In-Shoe Comfort: All Terrain Compound (A.T.C.) midsole offers cushioning for your every step Ascent last providing a tailored instep and anatomical toe box Anatomical high rebound footbed Durability & Traction: Vibram Nanga with LiteBase Technology and Megagrip Compound for a lightweight, grippy, and durable sole Additional Details: 1.8 mm Suede Leather 2 lbs. 7 oz. (1120g)