NWT Birkenstock Arizona EVA sandals in navy. 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. 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. Anatomically shaped BIRKENSTOCK footbed made from EVA Upper/lining/sole: one piece molded EVA Details: two straps, each with an individually adjustable pin buckle; waterproof, washable, ultra lightweight “Made in Germany” EVA (ethylene vinyl acetate) is 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.