OOFOS | Shoes | Oofos Oocoozie Mule Slippers Black Fleece 。Men’s OOFOS Men\'s OOcoozie Black fleece Mule- Size 8. Excellent condition; minimal signs of wear. See all photos. Smoke free home. Fast shipping Details The OOcoozie Mule is the perfect around the house or post-gym option to slide into for stability and relief. Our unique one-of-a-kind OOfoam™ technology that absorbs impact is matched with a warm vegan sherpa material that is both recyclable and machine washable. Add in the patented footbed design that cradles and supports arches and you’ll recover faster. A versatile hygge style boasting active recovery - get cOOzy.