Sunscreen Math: Is SPF 30 Twice as Good as SPF 15?

Summer is coming, and if you’re as pasty as I am you may have already gotten your first hint of sunburn this year (since after all, the days are just as long now as in mid-August, though it likely doesn’t feel anywhere near as hot yet). It’s time to go stock up on sunscreen, but you may notice that the labels look a bit different this year. Here’s why. Read More Sunscreen Math: Is SPF 30 Twice as Good as SPF 15?