FEATURES: Lace-lock bungee system with adjustable hook-and-loop heel strap for easy on & of. Multi-directional lugs for increased traction Non-marking rubber outsole leaves no trace EVA insole with arch support for all-day comfort Contoured Fit-Follows foot's contours for a more secure fit Eco Anti-Odor for natural odor control Original Fit-Iconic KEEN fit with generous space across forefoot for toes to spread out Machine washable. Use a small amount of detergent. Wash on gentle cycle and air dry.