Birkenstock began over two centuries ago and not much has changed since then. All Birkenstock sandals and shoes are 100% renewable and natural. Although it can take a bit of getting used to, Birkenstock shoes are designed to allow your toes and feet to have plenty of room, providing elevated levels of comfort and "breathe". You will also enjoy a contoured footbed that supports and shapes to your foot as you walk. Birkenstocks not only supports your feet, but also the environment.