KérastaseKérastase Cristalliste Masque Cristal - Nourishing Mask

BUY at Birchbox

If you've ever grown out your hair (or tried to maintain a long mane), you know how important it is to keep your ends healthy and strong. We like to stretch out the time between our salon visits with Krastase's Masque Cristal, a deep conditioning treatment specifically designed for long hair. It nourishes and protects strands (read: prevents split ends and brittleness) without weighing them down, leaving hair soft, supple, and full of healthy bounce.