An asymmetric eye-catcher. The Birkenstock Yao is popular with people who like unusual fashion and is sure to turn heads. Here, the sophisticated interplay of the material gives the classic model a new look. Thanks to the brushed Birko-Flor, the vegan version can easily be mistaken for genuine leather. It is entirely free of animal products, as verified by independent testing laboratories. It has anatomically shaped cork-latex footbed, synthetic upper, microfiber footbed lining, EVA sole and two straps, each with an individually adjustable metal pin buckle.