amika Smooth Over Frizz-Fighting Treatment Mask

This 60-second in-shower rinse-out treatment is clinically proven to instantly reduce frizz by 73%* and keep frizz reduced for up to 72 hours* thanks to time-released humidity protection. It’s 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 and our signature superfruit sea buckthorn. The results: Your hair, only 2.2x smoother.* *clinically proven, after one use - Frizz Control for Consumer Product, tested by TRI Princeton May 2023