The BIRKENSTOCK Boston is a true classic that can be worn all year round. With its refined, individually adjustable design, Boston has long since achieved legendary status. The particularly thick, oiled nubuck leather upper has a raw edge design. Anatomical cork and latex footbed Upper: oiled nubuck leather Oversole: suede leather Sole: EVA Details: a strap with an individually adjustable metal buckle "Made in Germany " Upper: Greased leather The greased leather is recognizable by its untreated surface. BIRKENSTOCK chooses not to treat the ribs and other characteristic features. For the upper, BIRKENSTOCK uses a leather of 2.8 to 3.2 millimeters. Insole: Insole The hypoallergenic and flexible leather insole gently hugs the foot and adapts to its contours. The open-pore surface is particularly thermoactive and keeps the feet at a comfortable temperature even during intense physical activity. Footbed Material: Cork Cork is a renewable raw material that is extracted from the bark of the cork oak tree. An unquestionable classic, Birkenstock never miss when it comes to the Boston. Complete with their standard cork footbed underfoot, this extra-thick, oiled nubuck leather clog combines an adjustable strap with an EVA sole unit and cork-latex combo. Made in Germany, of course.