Birkenstock Boston Stone Coin | eBay。NWT Birkenstock Boston Essentials EVA Clogs Stone Coin 44 M11 Slip On Clog Sandals Regular Width Our best-selling clog in an ultra-lightweight style. The Boston EVA is made from water-friendly material, giving you a flexible design built on the contoured footbed you love most. The perfect pair for pre-workout, post-practice and all the rest days in between. Contoured footbed for legendary BIRKENSTOCK support Style made from single piece of EVA Water-friendly, flexible & lightweight Adjustable strap with tonal pin buckle Made in Germany