Lightweight, leave-in thermal protecting serum buffers against heat styling damage & 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 & 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.