The Arroyo II elevates performance footwear to the next level by combining all the support and function you expect from a trail shoe, the open breathability of a sandal, and Keen's patented toe protection. Washable waterproof leather and mesh webbing upper. Secure foot capture lace system. Torsion stability ESS shank. GIS Microbe Shield treated SBR lining controls bacteria and fungi that cause odors, stains, and product deterioration, while being free of environmentally harmful substances. S3 Heel support structure is engineered to support the foot on impact, dissipating shock and reducing the chance of ankle twisting. Removable metatomical footbed. Non-marking carbon rubber outsole with 4mm multi-directional lugs. Weight: 13.7 oz. (388g).