The OOriginalThe Sandal that started it all. With its sleek design and OOfoam recovery technology, the OOriginal Sandal was proven to be so effective, its spirit lived on in all OOFOS' later styles and models. OOfoam technology absorbs 37% more impact than traditional footwear. Patented footbed design reduces stress on knees, ankles and other joints. Closed cell foam is machine washable and designed to minimize odor. ITEM # 1000BLK