By Erica Metzger
Your favorite summer lotion is likely too wimpy right now. "Lightweight formulas have a high water content so when it gets cold and dry outside, they evaporate easily and steal some of your natural moisture in the process," says Ni'Kita Wilson, a cosmetic chemist in Englewood, New Jersey. Upgrade to a heavier cream that contains oils, butters, or waxes. Hint: If it comes in a jar, you know it's substantial enough.