Modeled on the legendary two – strap Arizona the Birkenstock Arizona EVA in Popcorn is made from ultra light and highly flexible EVA. The high – quality, odor – neutral EVA has been tested for harmful substances and combines numerous positive attributes. It is ultra lightweight, highly elasticated, shock – absorbent, waterproof, skin – friendly. Wear them at the beach, in the garden, or around the gym and after workouts.