BIRKENSTOCK. 1018 923. ARIZONA EVA ESSENTIALS KIDS. BEETROOT PURPLE. 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.