Features Environmentally preferred premium leather from LWG-certified tannery Eco Anti-Odour for natural odor control Contoured Fit–Follows foot's contours for a more secure fit Materials Waterproof full-grain leather upper Quick-dry lining for active use EVA insole with arch support for all-day comfort Non-marking rubber outsole leaves no trace Care Our water sandals are machine washable. Use a small amount of detergent, wash on gentle cycle, and air dry.