SPF refers to how much longer you can stay in the sun before turning pink (sunburn). An SPF of 15 means that you can theoretically spend 15 times as long as without the sunscreen before getting pink.

   Look for a sunscreen product with both UVB and UVA protection and a sun protection factor (SPF) of 15 or greater.

   Apply sunscreen at least 20 minutes before going into the sun, and reapply generously after swimming. Reapply sunscreen throughout the day.

   Remember that perspiration will reduce the effectiveness of your sunscreen.

   Sunscreen is most effective when applied liberally and left on the surface of the skin. Do NOT rub it in thoroughly.