The A11012_635 Asolo Men's TPS 520 GV EVO Hiking Boots have a one-piece water-resistant 2.8 mm full grain leather upper. Gore-Tex® lining, waterproof and breathable. Asolo/Vibram® highly technical sole. The outsole incorporates three shock absorbers that correspond with the areas of foot that receive highest impact during activity. One-Piece Water-Resistant Full Grain Leather 2.6-2.8 mm Gore-Tex Performance Waterproof and Breathable Lining Lite 2 Anatomic Footbed Midsole in Dual-Density PU Asoflex 00 MR Lasting Board Triple Power Structure EVO Asolo/Vibram Highly Technical Outsole A11012_635 Asolo Men's TPS 520 GV EVO Hiking Boots - Chestnut