Kerastase

Pricy, yes, but it’s the best in the business. The bottle lasts forever (my mom has had the same one for, like, four years) and the super-fine mist covers a lot of area without having to spray over and over again, even on long hair. The other reason I prefer this UV protectant spray over all others is the actual texture: while other high-end UV sprays I’ve tried leave my hair sticky, this one has a soft, silky finish that isn’t greasy, either. It also defies humidity and flattens frizz. [Micro-Voile Protecteur, $37, Kerastase]