what is smooth over frizz-fighting treatment mask? ready to play it smooth? this 60-second smoothing treatment instantly reduces frizz by 73%* (even in high humidity!) for 2.2x smoother hair that lasts up to 72 hours.* who it's for you already guessed it—all hair types wanting to smooth over unwanted frizz. why it's special fight frizz, without stressing out your strands. this in-shower, rinse-out treatment is powered by smoothing superstars like glycolic acid—which helps to smooth the hair cuticle while creating a barrier to block out frizz—plus water lily extract + our signature superfruit sea buckthorn. the results: your hair, only 2.2x smoother.* • keep your cool even in high humidity: keeps frizz reduced for up to 72 hours* thanks to time-released humidity protection. • the smoothest results: instantly reduces frizz for hair that’s softer, shinier + more manageable. • fast + effective: get wow-worthy results quickly—it takes just 60 seconds with smooth over to instantly reduce frizz + smooth strands.