The all new Reef One. These lightweight and eco-minded sandals are waterproof, machine washable, and extra comfy making them the ultimate beach companion. The Reef One is a fully molded one piece thong with no stitching or seems and built in arch support for instant comfort. Dual density, injection molded One piece EVA sandal. Super soft cushion EVA footbed with a firmer, more durable non-marking EVA outsole. Eco-One enhanced biodegradability. All day support from anatomic contouring. Machine washable. Waterproof for easy cleaning.