The Birkenstock Boston model is a true classic that can be worn without any problems all year round. Thanks to its refined individually adaptable design, the Boston has long since entered the legend. This flat which, once worn, reminds of the lightness of cork sandals, is made of particularly light and very flexible EVA plastic. The high-quality, odourless and pollutant-free EVA plastic combines many positive properties: it is very light, extremely elastic, shock-absorbing, water-resistant and skin-friendly. BIRKENSTOCK anatomically shaped EVA footbed Upper, insole, sole: EVA in one piece. Details: water resistant; washable; ultralight "Made in Germany"