The BIRKENSTOCK Boston is a veritable classic that can easily be worn all year round. The Boston has a legendary status thanks to its sophisticated, individual design. Shown in Ethylene-Vinyl Acetate or EVA, a synthetic waterproof and lightweight material. Super lightweight - great for after the gym or the beach. Anatomically shaped BIRKENSTOCK footbed made from EVA. Upper, lining, and sole - a single piece of EVA. Details - waterproof, washable, ultra lightweight “Made in Germany”.