The Oofos Ooriginal Thong is the most popular shoe that soothes and reinvigorates your feet after a workout. It includes OOfoam technology, the patented footbed design that absorbs impact, cradles your arches and allows you to move naturally. It is 100% Synthetic and machine washable. The OOfoam Recovery Technology absorbs 37% more impact than traditional footwear foam. The Patented footbed cradles your arches to reduce stress on sore feet, ankles, knees and lower back.