OUAI's leave-in not only hydrates, but reduces frizz, prevents heat damage, detangles, and adds sheen to leave your locks looking glossy. It boasts a lux fragrance, too — and a little bit goes ...

I let it air dry, as I always do, and unlike other days when I skip any sort of product, post-Ouai leave-in, the top of my head—which is usually ridden with flyaways and frizz—was silky smooth.

Jen Atkin, founder of Ouai and Kashish Golani, founder of Ovviovita are among those creating scents that hydrate, protect and add shine, merging hair care with perfume for a luxurious finish.