The function of Winter base layers is pretty straightforward; they're the first layer you put on to help keep you warm, dry, and comfortable when exercising in the cold outdoors. But just because no one else will see these underlayers doesn't mean you have to stick with boring black. Here are 10 colorful base layer tops and leggings that are anything but basic!
10 Base Layer Tops and Leggings That Make Basics Fun
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