OOFOS. 1400 BLKBLK. WOMENS OOLALA SANDAL. BLACK ON BLACK. The OOlala sandal features revolutionary OOfoam technology that absorbs 37 percent more impact than traditional footwear foam materials to reduce the stress on your feet and joints. This technology aids in the recovery process and creates an incredibly comfortable sandal you can wear anywhere. This feminine silhouette has slightly narrow footbed compared to the OOriginal which compliments every outfit day or night.