 an advertising tactic to make you, you know, buy something of a higher SPF, but it really isn't going to make much of a significant difference protecting your skin. That's a great question. So the SPF stands for sun protection factor, and they really start off by about at around 15 and goes way up to about 70 or above. I think the American Academy of Dermatology recommends a minimum of SPF of 30, which is