A lightweight serum formulated with optimized high and low molecular weight Hyaluronic Acids that helps to hydrate, reduce frizz and brittleness, and improve shine while protecting hair from the effects of environmental pollution. Hyaluronic acid is a well-known ingredient in skincare for its highly hydrating properties. A lack of hydration in the hair can be caused by a variety of factors, including over-washing, using hot tools without heat protection, and humidity. When your hair becomes dry, the cuticle becomes rough and open, causing moisture loss and frizz. Ingredients: Water (Aqua /Eau), PEG-40 Hydrogenated Castor Oil, Betaine, Panthenol, Phenoxyethanol, Polyquaternium-37, Citronellyl Methylcrotonate, Ethylhexylglycerin, Hydrolyzed Hyaluronic Acid, Trisodium Ethylenediamine Disuccinate, Lactic Acid, Sodium Hyaluronate. How to use: As a post-wash treatment, apply. Shake vigorously before using. Pour Hyaluronic Acid Hydrating Hair Treatment into the palm of your hand, then massage through wet or dry hair. Apply enough to evenly coat your hair. Continue styling as usual. Use it 1-2 times per week.