Ethylene Vinyl Acetate sole Rubber sole designed to be very Lightweight 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