Birkenstock Arizona EVA Sandals. The legendary two-strap design from Birkenstock - the Arizona for kids. 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 backyard, or by the pool. Sandals for all-day play! Anatomically shaped Birkenstock footbed made from EVA. Upper/lining/sole: one piece molded EVA. Two straps, each with an individually adjustable metal tongue buckle; waterproof, ultra lightweight. Imported.