Discover our No.1 professional home care range Opti.Care Smooth Straight. Specially developed for straightened hair, its super caring formulas are the experts favorite choice for smooth and straight professional hair results. A complete hair care regimen rich in shea butter that deeply nourishes, conditions, protects and tames frizz for up to 72 washes. The serum has a light, non-greasy formula that smoothes frizz and protects against split end damage to leave hair silky smooth with a reflective shine. It maintains straightened effect of hair for up to 72 washes (Instrumental Test on Straightened hair: Shampoo + Conditioner + Serum & a monthly Opti.Care Hair Treatment) Rub a small amount into hands and apply to dry hair, starting at the ends and working toward the scalp. Style as desired.