Kérastase Discipline Blow-Dry Smoothing Primer This Kérastase Discipline Blow-Dry Smoothing Primer ($22-$37) protects hair against a full range of environmental aggressions like heat and pollution, no matter the season. I like that it revitalizes my often-frizzy hair with keratin and ceramide in summer, so it's healthy on the inside and smooth on the outside, too. Image Source: sephora.com Kérastase Discipline Blow-Dry Smoothing Primer $22 from sephora.com Buy Now