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 to fit someone who wears a 23.5cm shoe 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 item on other flea market apps, so please be aware that it may be removed if it sells elsewhere. ⚠️ Please be careful when purchasing Birkenstock Bostons, Arizonas, Zurichs, etc., as many flea market apps feature obviously fake products. These fakes have different footbed and upper shapes, unnatural logos and size markings on the footbed, and lack the serial number stamped on the lining. There are many of these inferior imitations being sold at low prices, so please be cautious when buying. The Birkenstock official website also warns about counterfeit products.