I love to compare the Post Tan Moisturizer to a topcoat on a manicure. You would not tell your manicurist “Nah, I’m going to pass on the topcoat today”. Consider the moisturizer the topcoat for your spray tan. Not only is it assisting in locking in your color, but it is also infusing the skin back with moisture that your skin desperately needs. This will aid in the longevity of the spray tan. Low investment for your spray tan to last longer! Fun Fact - In order for your spray tan to develop, it will pull out the existing moisture from your skin. Another reason why it is so important to moisturize during the life of your spray tan (Hint – Glow System Body Butter).