This is the Birkenstock Boston VL/Shearling, a classic model. The lining is made of fluffy shearling. The high-quality natural sheep wool feels so good against the skin that you won't want to take it off. The upper is made of soft, natural suede that gently envelops your foot. The strap and buckle on the side allow you to adjust the fit to your liking. Because of the shearling lining, this is likely suitable for those who wear around a 23.5cm size, but it may be tight for those with wide feet or high insteps. Boston VL Shearling Product Number: 1020529 Color: Mocha (Dark Brown) Material: Upper/Suede Size: 37 (Narrow) Retail Price: ¥25,300 This is a genuine, authentic product purchased at retail price from a store in Osaka. It is new and unused, but has been stored at home. Please refrain from purchasing if you are overly concerned about condition. I am also listing this on other flea market apps, so please be aware that I will remove it if it sells elsewhere. ⚠️ Please be careful when purchasing Birkenstock Bostons, Arizonas, Zurichs, etc., as many flea market apps have listings with obvious differences in the shape of the footbed and upper compared to authentic products. There are also many cheap, poor-quality fakes with unnatural logos and size markings on the footbed, or without the serial number stamped on the lining. Please be very careful when purchasing. The Birkenstock official website also warns about counterfeit products.