Features Aquagrip rubber with Aqua Stop zonal siping provides maximum traction on wet surfaces Stability shank delivers lightweight support Slip-on design for easy on and go Recycled PET plastic Eco Anti-Odour for natural odor control Materials Upper contains recycled PET plastic bottles Recycled PET plastic bungee cord and lace-lock system Quick-dry lining for active use EVA insole with arch support for all-day comfort Non-marking rubber outsole leaves no trace Care  Water sandals are machine washable. Use a small amount of detergent, wash on gentle cycle, and air dry.