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Thermal underwear. Long underwear. Long johns. No matter what you call them, they’ve always been the best way to prepare yourself for frigid wintry weather or a cozy evening cuddle. Thermal underwear for women should fit easily under a variety of clothing, and we have plenty of options to add that crucial layer to your outfit and keep your body heat where it belongs: in your body!


Let the versatile texture of nylon and spandex thermal underwear conform to your body in a way that will insulate you from head to toe. From thermal fleece long johns to scoopneck shirts to long-sleeve half-zips, we literally have you covered. The best thermal leggings keep you warm without overheating, and are just as useful indoors as it is outdoors. When you’re faced with frigid temps or a chilly house, bundle up in a snug set of long underwear from JCPenney.