A Deep Heelcup . You may notice that a Birkenstock heelcup is deeper than what you'll find in most shoes and for a good reason. Your heel has natural padding that absorbs shock when you walk. Our heelcup helps make sure this padding rests directly under your heel bone, where it can do you the most good. A Firm Walking Surface.
Shoes are a little like mattresses.
The same is true for shoes. You're better off with firm support. Birkenstocks distribute your weight evenly across your foot, allowing you to walk farther comfortably. A Toe Bar. The Birkenstock footbed features an integrated toe bar.