As someone who loves the winter, I’ve had my fair share of borderline-frostbitten toes, but ever since I discovered the merino wool base layer, I’ve been able to stay out longer than ever.

Fortunately, we’ve got an easy trick to tell which merino wool base layer is right for you. Merino wool base layers, also known as thermal underwear or long underwear, come in various weights ...

Good base layers should be formfitting — not tight but not loose — in order to retain heat. They are often woven from merino wool or technical synthetic fabrics that also have moisture-wicking ...

Like the socks this brand built its reputation on, the Smartwool Merino 150 base layer uses Merino wool – a material that's often used for outdoor apparel, being breathable yet warm, and ...

Layering is not a complicated thing. It's the process of adding and removing layers of clothing to keep your body comfortable in changing weather and temperature conditions.