Upper/lining/sole: one piece molded EVA Individual straps with adjustable pin buckle Waterproof, washable, ultra lightweight The legendary two-strap design from Birkenstock - the Arizona. Modeled on the cork original, this sandal is made from ultra lightweight and highly flexible EVA, a high-quality, very light, elastic material with very good cushioning. As a result, it smooths out slight irregularities in the floor and ensures that every step is softly cushioned. 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.