The Birkenstock Women's Arizona Vegan Birkibuc Sandals are complemented with the signature comfort of the BIRKENSTOCK footbed. The legendary two-strap design from BIRKENSTOCK is now available in vegan materials and includes an upper made from Birkibuc, a skin-friendly, hard-wearing synthetic material. The look and feel of Birko-Flor® Nubuck is an almost perfect imitation of authentic nubuck leather.