Design: Waterproof full-grain leather upper Lace-lock bungee system provides a secure fit In-Shoe Comfort: Quick-dry lining for active use Leather-wrapped PU insole for durable comfort Durability & Traction: Non-marking rubber outsole leaves no trace Additional Details: Made with environmentally preferred leather from a LWG-certified tannery Keen Men's Daytona II Sandals