ThermaSmooth is Mizani?s salon-exclusive, synergistic thermal smoothing system designed to repair, protect and smooth the hair from the very first step. With Mizani?s exclusive C3 Smoothing Complex of Coconut Oil, Ceramides and Cationic Polymers, Thermasmooth provides weightless protection for long-lasting, frizz-free, smooth style - ideal for use on natural, excessively curly hair to hair that is relaxed and or color treated. MIZANI Thermasmooth Smooth Guard Smoothing Serum 3.4 OZ STEP 3 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.