WHAT IT ISDry hair can cause frizz, static and flyaways. Inspired by the legendary hydrating and healing aloe plant, Biolage Hydra source moisturizing Daily Leave-In Tonic for dry hair helps optimize moisture balance for healthy looking hair. This leave-in clarifying treatment balances and strengthens hair for enhanced hair shine and reduced hair breakage. 400 ml. Made in USA.WHO IT'S FORRecommended for fine to medium hair.WHAT IT DOESHydrates and strengthens hair for more shine and reduced breakage.HOW TO USE ITMist lightly on damp hair and comb through from root to tips. Do not rinse. In case of contact with eyes, rinse them immediately. Matrix recommends that you pair Hydrasource Daily Leave-In Tonic with Hydrasource Shampoo and Conditioner for extra moisture and hydration.