What it is: A booster that instantly transforms any serum, oil or cream into a custom self-tanner. Who it's for: All skin tones. What it does: After use, this booster helps you develop an even, natural tan after four hours. How to use: For best results, shake prior to each use. Adjust the number of drops to achieve your desired tan. Use as often as desired. 1 oz. Paraben-free; gluten-free; synthetic fragrance-free Made in the USA