The Rio - a cute and sporty classic from BIRKENSTOCK. This functional style features an ultra lightweight and highly flexible EVA, backstrap and our signature footbed for added comfort & support. These sandals are shock absorbing, waterproof, and skin-friendly. Wear them at the beach, in the backyard, or by the pool. Anatomically shaped BIRKENSTOCK footbed in EVA Upper/lining/sole: one-piece EVA Details: shoe molded from a single piece, waterproof, washable, shock-absorbent, ultra lightweight “Made in Germany”