PROTECT ALL THE SKIN YOU'RE IN Use a Layered Approach for Sun Sunscreen works best when used with shade or clothes, and it must be re-applied every 2 hours and after swimming, sweating, or toweling off. Wear a hat, sunglasses, and protective clothing to shield skin. Richland County Health Department Prevent, Promote. Protect. m M Protection. CDC U.S. Department of Health and Human Service Centers for Disease Control and Prevention Use broad spectrum with at least SPF 15 protect exposed skin. Seek shade, especially during midday hours. PROTECT ALL THE SKIN YOU'RE IN Use a Layered Approach for Sun Sunscreen works best when used with shade or clothes , and it must be re - applied every 2 hours and after swimming , sweating , or toweling off . Wear a hat , sunglasses , and protective clothing to shield skin . Richland County Health Department Prevent , Promote . Protect . m M Protection . CDC U.S. Department of Health and Human Service Centers for Disease Control and Prevention Use broad spectrum with at least SPF 15 protect exposed skin . Seek shade , especially during midday hours .