The BIRKENSTOCK Boston is a true classic that's easy to wear all year round. With its refined, individually adjustable design, Boston has long since achieved legendary status. The upper is made of supple, high-quality natural leather.Anatomical cork and latex footbedUpper: natural leatherOversole: suede leatherSole: EVADetails: a strap with an individually adjustable metal pin buckle "Made in Germany"Upper: Natural leatherNatural leather is recognized by its untreated surface. BIRKENSTOCK has chosen not to treat the characteristic veins and autres signs. For the upper, BIRKENSTOCK uses 2.8 to 3.2 millimetre leather.Insole: InsoleThe hypoallergenic, flexible leather insole hugs the foot gently and adapts to its contours. The open-pore surface is particularly thermoactive, keeping feet at a pleasant temperature even during intense physical activity.Footbed material: CorkCork is a renewable raw material extracted from the bark of the cork oak tree. This natural product is a thermal insula...