Infusing your hair with a special CHI 44 compound, CHI 44 Iron Guard Thermal Protection Spray counteracts the damaging effects of heat styling. You can style until your hearts content, protecting your hair from the inside out. CHI 44 Iron Guard Thermal Protection Spray provides superior heat protection from the inside out against styling and finishing damages from the hottest heat tools. The weightless formula leaves no build up. Directions of use: Section hair and spray CHI 44 Iron Guard evenly over dry hair. Start using your heat tool from root to end.