13.5 Ounces. Optimum Oil Therapy featuring Micro-Oil Technology. Micro-OilTechnology penetrates hair with micro beads of natural oils to help nourish, repair, strengthen and protect hair. Optimum Oil Therapy Ultimate Recovery Shampoo cleanses, instantly softens and revitalizes dry, damage prone hair. Nourishes hair with natural extracts of coconut, olive, avacado, and jojoba. Detangles and tames unruly hair.