Product Overview Nioxin 3D Styling Therm Activ Protector 150ml is a heat-activated spray that shields your hair from the damage caused by heat styling. Benefits Before heat styling, simply spray over your hair & comb through, to protect each strand from the coarseness & breakages that can occur as a result of repeat heat exposure. Formulated with LIGHTPLEX technology, this protector also defends your hair against environmental damage, ensuring that you continue to stay looking gorgeous all throughout the day.