RARE Birkenstock Boston Birko-Flor Desert Soil Camo Green Sandal Clog Size 42 / US Mens 9 Excellent Condition! The BIRKENSTOCK Boston clog is the perfect shoe for year round wear. This shoe features tone-on-tone which gives it a trendy camouflage look as well as color-coordinated buckles for a stylish addition. 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: strap with an individually adjustable metal pin buckle with a textile feel