The Birkenstock Boston wool felt anthracite is a comfortable mule and can be worn by both men and women because of the anthracite colour. The wool felt upper has a playful look. Above the instep a strap is attached to adjust the mule to your foot. The mule has a deep heel indentation and toe grip for optimal walking comfort. The anatomically shaped Birkenstock foot bed has a suede top layer. The Birkenstock Boston wool felt anthracite is available in the width ‘normal’.