What it is: A serum formulated to help plump, hydrate and stimulate radiant skin. What it does: The innovative heat- and light-activated formula is designed to boost the benefits of the HD Red Light FaceMask (sold separately). Used alone, the nourishing blend of bio-nutrients and clean ingredients is powerful on-the-go hydration. Your skin will get a major glow up. How to use: After gently cleansing skin, apply the serum over face and neck and allow the nutrients to absorb into skin. If you are using without technology, continue with your skin care routine. If you are going for a supercharged glow, secure your HD Red Light Face Mask device (sold separately) to your head and treat skin for a minimum of 10 minutes. 1 oz. Pthalate-free; silicone-free Made in the USA