Care Instructions Machine Wash Sole Material Ethylene Vinyl Acetate, Rubber Outer Material Upper MaterialAir Mesh with Transparent Sonic Welding Closure Type Lace-Up About this Item SPU Toe Material has waterproof coating, is easily cleaned, and abrasion resistant Cushioned EVA Midsole and Removable premium insole for added comfort Durable Rubber Outsole will last with aggressive Lugs for slip-resistance Breathable Air Mesh keeps feet cool with "Flex Window" over the toe, and "Flex Grooves" in the sole allows great flexibility