OOFOS Women's OOlala Thong Flip Flop 100% Synthetic Imported Synthetic sole OOlala style provides the same proprietary OOfoam technology in a feminine silhouette OOfoam Recovery Technology absorbs 37% more impact than traditional footwear foam Patented footbed cradles your arches to reduce stress on sore feet, ankles, knees and lower back Biomechanically designed to allow natural motion Machine washable