Let your feet move naturally. Enjoy almost-minimalist sandals without sacrificing fit and protection. The CNX series deliver Keen performance in a slim, lightweight package, and all-synthetic construction makes the Clearwater equally at home on land or in water. Uppers are made of washable polyester webbing. Bungee quick-lace system. 4mm midsole-drop positions feet in a natural stance. Midsoles are a lightweight PU compound that delivers longer lasting support, protection, and comfort than EVA foam, and with less bulk. Metatarsal ridges for natural underfoot support. TPU shanks for stability. Non-marking carbon rubber outsoles have lugs with sipes (small slits) for traction on trails and slippery smooth surfaces.