Lightweight, leave-in thermal protecting serum buffers against heat styling damage and facilitates the use of heat tools by providing extra glide for easier manageability. The advance C3 Smoothing Complex with cationic polymers is designed to shield and polish while hair is being smoothed.Directions for use:Apply a coin sized amount of Mizani Thermasmooth Smooth Guard Smoothing Serum throughout your towel dried hair. Style as required.