OOFOS OOcoozie Mule envelops feet in ultimate comfort. These recovery shoes help to rejuvenate and offer the support needed after a long day. With OOfoam technology, impact is absorbed, lessening stress on feet, joints, and back. The vegan sherpa material surrounds the foot in warmth and is conveniently machine washable. Cradling the arches, the patented footbed design provides additional support for faster recovery.