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, individually adjustable design. This version boasts an authentic and rustic mix of materials featuring soft synthetic felt and thick natural leather. Anatomically shaped cork-latex footbed Upper: synthetic felt; natural leather Footbed lining: suede Sole: EVA Details: strap with an individually adjustable metal pin buckle “Made in Germany” Upper material: Material combination For this shoe, a combination of materials was used. You can find more information on our main materials in our Material Guide. Insole: Natural leather Footbed material: Cork Outsole: EVA