Conquer unpredictable shoulder season weather with these Merino wool base layers.

By trapping heat and wicking away sweat, the best base layers are a cheat code to staying warm when you bundle up, so we tested 15 and found three winners.

Layering is essential on cold days—but you need the right technique. Fabrics like polyester, nylon, and wool work nicely for the base layer, which is closest to your skin, since they’re ...

Lined with soft heat-retaining fleece, these thermal turtleneck tops are as chic as they are warm. They come in a convenient pack of four that includes all the neutral hues you need at an affordable ...