PhD Heat Styling Spray is the perfect companion for your heat tools. Achieve long-lasting, lightweight smoothness that lasts up to 48 hours. This spray will adapt to the way you style –use on damp or dry hair, with a heat tool of your choice. However you choose to style, your hair will be protected from heat up to 450°F and remain touchable and soft. Smoothness for up to 48 hours Heat protection up to 450? / 230°C Ultra-fine mist ensures even application Helps hair stay cleaner, longer, so you can heat style less often For all hair types, best performance on fine to medium hair types. HOW TO USE Hold canister 6-10” away from damp or dry hair. Section and apply in a sweeping motion throughout hair. Style with a heat tool. Finish with a final spray for extra smoothness and shine.