Arch support, adjustable straps, and waterproof construction €? all in a lightweight EVA package from Birkenstock. Thousands of tiny bubbles in the material act as shock absorbers, meaning these will do a lot more work for you while walking than most other waterproof sandals. Wear them to the beach, in the water, out for lunch, hose them off at the end of the day, and repeat. 100% EVA for lightweight waterproof comfort. Slip-on style with straps that open. Toe bar guides your toes into place and promotes natural steps. Moulded EVA footbed and outsole for lightweight durability and shock absorption. Raised footbed edge to protect your feet from stubbing. This product does not contain animal products or by-products.