Features of the Keen Men's EvoFit One Sandal Quick-dry keen EvoFit engineered synthetic Upper Minimal waste construction TPU reinforcement for added durability in key zones Evolved Performance lace-capture system Removable, metatomical PU Footbed with arch support PU Midsole for comfort Aquagrip rubber Outsole maximizes traction Multi-directional lugs with razor siping PFC-free durable water repellent Cleansport NXT for natural odor control