This weekly pre-shampoo treatment repairs and prevents damage for stronger, healthier-looking hair after just one use. Not a conditioner, mask, or protein treatment– Nº^.3 Hair Perfector™ is an innovative bond builder to repair damage where it starts, on a molecular level. That’s why it’s the little bottle stylists, editors, and healthy hair seekers swear by. \n \nPatented OLAPLEX Bond Building Technology™ rebuilds broken disulfide bonds to restore strength for visibly healthier hair. \n \nKEY BENEFITS \n- Repairs and prevents damage \n- Hair looks and feels healthier \n- Reduces breakage and split ends