What it is:A lightweight spray that dries fast and leaves hair shiny and frizz free.What it does:Living Proof Straight Making No Frizz Styling Spray for Fine to Medium Hair offers the first new anti-frizz technology in over 30 years. No Frizz addresses the two causes of frizz humidity and friction. It provides a superior, extremely thin humidity barrier on hair while reducing surface friction. The result is the most effective, lightweight frizz fighter on the market today.What else you need to know:No Frizz formulas efficiently deliver PolyfluoroEster to the surface of the hair in one smooth, perfect layer, devoid of any extraneous additives. This spray styling aid repels dirt and oil so you can go longer between shampoos. It also works great as a touch-up tool and an effective detangler for all hair types.