Winter is notorious for drying out skin, but summer heat and sun exposure are equally to blame. "One of the most effective ways to exfoliate during the summer is to use a scrub on dry skin before you shower," says New York dermatologist Dr. Jeannette Graf. "Pay special attention to knees and elbows. And finish with a rich body cream or oil within three minutes of toweling off." Our favorites? The Suki Exfoliate Foaming Body Cleanser ($35; saffronrouge.com), and Carol's Daughter Goddess Flower Dry Oil Mist ($21; carolsdaughter.com). See more ways to keep your skin healthy at every age in our gallery!