Razor-siped outsole channels water away for exceptional grip Eco Anti-Odor for natural odor control MATERIALS Recycled PET plastic cord upper forms to the foot Recycled PET plastic bungee cord and lace-lock system Soft microfiber lining PU insole with arch support for long-lasting comfort Non-marking rubber outsole leaves no trace CARE Hand wash with cold water and mild soap. Remove excess dirt/spot clean with a stiff brush or soft cloth. Do not machine wash. Allow to air dry away from heat.