The BIRKENSTOCK Boston is our classic clog that can easily be worn all year round. The upper is made of oiled nubuck leather which forms a natural patina over time - for a natural, rustic look.- Anatomically shaped cork-latex footbed- Upper: Oiled nubuck leather- Details: Adjustable metal pin buckle- Lining: Suede- Lightweight EVA sole for cushioning and shock absorption- Avoid extreme heat- Made in Germany