This pair of slides from Birkenstock is an asymmetric eye-catcher. The Birkenstock Yao Vegan is popular with people who like unusual fashion and is sure to turn heads. The colour-coordinated outsole rounds off its look of sophistication. This popular pair has been given an update in a new material with a vegan version. It is entirely free of animal material, as verified by independent testing laboratories. The upper is made from a skin-friendly and hard-wearing material. Besides, Orthotic Friendly technology has been used in its making.