Boston Shearling Slippers by Birkenstock Women's.The BIRKENSTOCK Boston is a classic go-to clog. The Boston has a legendary status thanks to its sophisticated, individually adjustable design. This classic model comes in an especially cozy version with genuine shearling lining the footbed and the upper. The perfect shoe for cozy winter evenings! The upper is made from soft suede. Anatomically shaped cork-latex footbed Upper: suede Footbed lining: genuine shearling Sole: EVA Details: strap with an individually adjustable metal pin buckle “Made in Germany” Upper: Suede / Shearling Insole: Natural leather Natural leather can be recognized by its untreated surface. BIRKENSTOCK purposely does not treat surface grains and other characteristic features. BIRKENSTOCK uses sturdy leather with a thickness of 2.8 to 3.2 millimeters as upper material. Footbed material: Cork Cork is a sustainable material extracted from the bark layer of the cork oak. This natural product is insulating and offers very good cushioning.Outsole: EVA EVA (ethylene vinyl acetate) is a high-quality, very light, elastic material with extremely good cushioning. As a result, it smooths out slight irregularities in the floor and ensures that every step is softly cushioned.