Please note:  OOFOS recommends buying half a size up in this style. The OOcoozie provides the perfect blend of cushion and stability for both indoor lounging and quick errands out. Now in a mule style with an easy, no fuss, slip-on design for your on-the-go lifestyle. The upper is constructed with a warm vegan sherpa material that is both recyclable and machine washable. Like all OOFOS products, it has our unique one-of-a-kind OOfoam™ technology that absorbs impact, so your body doesn’t have to. Active recovery with the soft, cozy warmth you desire in a versatile hygge style.