The K18 Leave-In Molecular Repair Hair Mask has quickly become the crown jewel of the brand’s science-backed, stylist-approved lineup. In recent years, K18 has cornered the market on easy-to-use, ...

So when Fable & Mane’s Shine Hair Mask, $36, made its way to my desk, I was more than a little intrigued. Unlike other hair masks, where the star ingredients are mostly glycerin and a handful of ...