• Best Of
Jul 20, 2012 3:00 PM EDT
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Summer Survival Guide: 10 Essential Beauty Buys From Your D.C. Editor
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Dermalogica_SPF-Booster_48-copy

"An SPF booster lets you use your favorite face cream, foundation, or tinted moisturizer year-round, because you can raise the level of sun protection with just a few drops. I swear by this Dermalogica option, which I use to ramp up my tinted moisturizer in the summer."

Dermalogica Solar Defense Booster SPF 50, $48, available at Dermalogica.