The Yao's geometric design balances fun and functionality. The strappy silhouette provides ample coverage, with adjustable buckles to ensure a good fit. It is made suede in a washed metallic look. This finish has a subtle vintage look that can vary from shoe to shoe and intensifies with frequent wear. Original BIRKENSTOCK footbed: anatomically formed Upper: leather Lining: suede Sole: EVA “Made in Germany” Lots of life left in them. The leather is distressed (styled that way) which makes it extra soft.