These are Birkenstock EVA - These sandals are shock absorbing, waterproof, and skin-friendly. Wear them at the beach, in the garden, or around the gym and after workouts. It's the perfect addition to your classic BIRKENSTOCK sandals. Heidi Klum limited edition collection. I bought them on Poshmark and they were like new, and still are. Only have worn twice. Questions? Leave a comment below!