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Dollar for dollar, a thermal base layer is the best investment in winter warmth you can make. It stays close to your skin where it can do its job of insulating and wicking moisture without bunching up under your clothes.

All Purpose

These base layers are designed to not bunch up or pull down, even during strenuous activity. Thermajane

A base layer should fit snugly so it can do its job of wicking moisture away from your body. It doesn’t have to be so tight as to be uncomfortable, though, so buy something you’ll want to wear all day.

Great Stretch

The soft polyester and spandex material is soft with plenty of stretch, and the scoop neck top looks good with more layers or by itself. PISIQI

To layer for warmth, wear a wool or fleece top over the base layer. Add a vest if it’s cold. Top your layering system off with a breathable, waterproof shell to keep out the wind and rain.

Color Selection

Available in 16 different colors, patterns, and weights, these have a dressy trim around the neck. Rocky

Even the best moisture-wicking synthetic base layer retains odors after a while, so buy more than one set so you can wash one while you’re wearing the other.