The BIRKENSTOCK Boston is a true classic that can easily be worn all year round. The Boston has achieved legendary status thanks to its sophisticated and unique design. Inspired by the cork sandal, it is made from ultra-light and highly flexible synthetic material, EVA. The high-quality, odour-neutral EVA has been tested for harmful substances and combines many positive attributes: it is very lightweight, highly elastic, cushioning, waterproof, and gentle on the skin.Anatomically shaped BIRKENSTOCK sole made of EVAUpper/lining/sole: a single piece of EVADetails: waterproof, washable, ultra-light"Germany"