The popular Birkenstock Boston is now available in the very special version that is free of any animal products. The vegan composition of the material is checked by independent laboratories. The upper of the Boston vegan pull up olive has a vintage look and is made from microfiber. Above the instep, a strap is attached to adjust the mule to your foot. The foot bed is anatomically shaped with a breathing top layer made from soft microfiber. The foot bed has a deep heel indentation and toe grip for optimal support. The Birkenstock pull up vegan olive is available in the width “normal and wide”.