Amazon.com | KEEN Men。Excellent, preowned condition Waterproof When you want to hike light and fast, the less resistance the better. That’s where flex can help. So we took our proven hybrid hiker-sneaker platform and added KEEN.BELLOWS FLEX at key flex points. For a men’s waterproof hiking sneaker that flexes where you do. Made with durable, mesh and featuring a moisture-wicking lining, the KEEN Men’s Tempo Flex Low Height Lightweight Waterproof Hiking Shoe is built off KEEN\'s traditional wider footwear form. KEEN products are consciously created using a natural, pesticide-free probiotic-based technology called Eco Anti-Odor for breaking down odor in sweat, PFC-free water repellent (in applicable styles) and leather sourced from Leather Working Group (LWG)-certified tanneries. KEEN makes shoes to make a difference. From the products it makes, to the actions the it takes, KEEN inspires people to live and work monumental every day. As a brand born for life outside, KEEN has a responsibility to protect and conserve the places where all people live, play and work