The little print on your sunscreen mark matters, so verify you're picking the right sunscreen for your action, particularly if that movement includes sweat, a pool, or the sea. "Verify you get a water-safe plan for swimming or exercises where you'll sweat, in light of the fact that non-water-safe equations can slide right off," says Dr. Sherber. "In addition, they have a tendency to specify relocate into eyes and sting, though water-safe ones won't."