KEEN Men's Clearwater CNX Sandal 100% Textile and Synthetic Made in the USA or Imported Rubber sole Platform measures approximately 0.5 inches Sport sandal featuring bungee lacing system, patented toe guard, and rear pull-on loop 4mm midsole drop , Aegis microbe shield treated lining All KEEN water sandals are machine washable. Use a small amount of detergent, wash on gentle cycle and air dry. Contoured arch for added midfoot support Multi-directional flex grooves. Material: Washable polyester webbing upper,Non-marking rubber outsole with razor siping,PU midsole,Hydrophobic mesh lining