Features of the Keen Men's Kona Premium Flip Flop Eva Footbed with arch support for all-day comfort EVA Midsole for lightweight cushioning Non-marking rubber Outsole leaves no trace Cleansport NXT for natural odor control PFC-Free, durable water repellent Environmentally preferred premium leather from lwg-certified tannery Metatarsal ridge for natural Fit Waterproof, premium leather Upper Quick-dry lining for active use