Birkenstock Kids' Boston Birkibuc Flower Buckle Clog (Toddler/ Little Kid)Size Chart The BIRKENSTOCK Boston clog is a veritable classic that can easily be worn all year round and offers support and protection for kids feet. This version stands out with its shimmering shiny snake look and a flower shaped pin buckle. The upper is made from the skin friendly, hard wearing synthetic material Birko Flor. Anatomically shaped cork latex footbed Upper: Birko Flor Footbed lining: suede Sole: EVA Details: one strap with an