What it is: An all-natural priming serum to hydrate the skin and boost the effects of the SolaWave Wand, sold separately.What it does: This serum is designed to be applied after your skin care routine and before your SolaWave to boost the effects of your SolaWave session. How to use: Start with a clean, prepped face. Apply a generous layer immediately before using your SolaWave Wand. If at any time the serum dries out or becomes less lubricated, simply reapply the serum to the skin or apply section-by-section to your face. 1 oz. Cruelty-free Vegan Made in the USA