The best shampoo and conditioner should volumize hair, not leave it limp. The OI Shampoo 3.04 oz. & OI Conditioner 2.53 oz. Combo Pack from Davines is a one-two punch of cleansing shampoo and moisturizing conditioner that infuse locks with volume. With daily use, hair becomes soft to the touch and easier to manage. Using this combination, you can get healthy, shiny hair in no time.