The perforation of the upper material and the extremely lightweight and supple sole provide a light and airy wearing comfort. An adjustable hook-and-loop strap provides a secure hold and a perfect fit. The Soft-Air midsole, flexible and soft, reduces the shock from walking to an absolute minimum. This protects your feet, joints and vertebrae, while maintaining proper hygiene. For a comfortable and effortless walk. Maximum heel protection is achieved by the shock absorber. The ultra light outsole combines extreme suppleness with incomparable lightness and gives excellent shock absorbency. The assurance of a tireless walk. The removable footbed can be replaced with your personal custom orthotics. The leather lining caters for a healthy climate in the shoe.