How to Select a Sunscreen
When selecting a sunscreen, make sure the label says:
Broad spectrum: The words "broad spectrum” means that the sunscreen can protect your skin from both types of harmful UV rays — the UVA rays and the UVB rays.
SPF 30 or higher: The American Academy of Dermatology recommends that you select a sunscreen with an SPF rating of 30 or higher.
Water resistant: Dermatologists also recommend that you look for the words "water resistant.” This tells you that the sunscreen will stay on wet or sweaty skin for a while before you need to reapply. Water resistance lasts either 40 or 80 minutes. Not all sunscreens offer water resistance.