KérastaseKrastase Masque Chroma Captive - Treat

BUY at Birchbox

Unless you were blessed with perfect natural hair color and grays never sprout from your head (i.e, you're one in a million), you probably color your hair. Just as likely? Color fading and chemical damage. Lock color in (see ya, premature fading) with this hair mask, which preserves your shade and keeps tresses soft and shiny for up to 40 days.