Birkenstock Callan Convertible mule/clog. 1st picture shows it's normal state and second with the heel folded down. Gently worn only in doors, smoke free home. Didn't fit me right and I missed the return window. No original box. Callan Leather Vintage Wood Black Size : EU 46 / US 13-13.5 Width : Regular/Wide Item no. 1021375