The Boston clog features a pony-like fur upper and is finished with an exclusive 1774 buckle. This design incorporates a nappa leather lining, an anatomically shaped cork-latex footbed, and a black EVA outsole. pony-like fur upper nappa leather lining 1774 buckle anatomically shaped cork-latex footbed tonal nappa leather covering black EVA outsole gold 1774 branding in the heel cup Birkenstock embossing on medial side 1774 box dustbag