This advanced hydration serum awakens skin with a pop of opalescence, boosts luminosity over time, and firms and soothes skin for a glass-like finish. Formulated with 1% fermented poly amino acid (aka polyglutamic acid) and 0.5% dipalmitoyl hydroxyproline, Amino Rain delivers powerful, long-lasting hydration. Its Hiya Super Hydration Water Complex helps boost skin's water recovery, improving elasticity and barrier function.