The Birkenstock Super-Birki mules are made of soft and resistant ALPRO foam, which is dimensionally stable, washable and disinfectable. As clogs, mules and slippers, they offer the perfect protection in leisure and work with certified safety. Footbed info: The heart of all models is the original Birkenstock footbed, which is based on the natural footprint of a foot in the sand. Thanks to this, walking in Birkenstock shoes is like walking barefoot. With its anatomical shapes, it optimally supports your feet in their natural stride. Feet, joints and back are protected. At the same time, the foot and leg muscles are trained. This promotes health and well-being.