The importance of SPF
I'm sure you all know about how important it is to wear SPF every day - even if you live up north and won't be seeing the sun for another 4 months. Aside from the super important cancer prevention benefits of SPF, wearing it every day is the best way to prevent wrinkles.
How do you know how high a number you should use?
I recently learned a nifty formula from an adorable gay facialist. Multiply the SPF number by 100, and that's how many minutes of protection it provides. 20 SPF will give you 200 minutes. While the dermys will tell us to reapply after 200 minutes, let's be honest - after spending 5-10 minutes putting my makeup on in the morning, there is no way that I'm going to take it all off, put on more SPF, and reapply several times a day.
Unless you want to do that, you must use at least a 40 SPF!
