Layers are essential for maintaining warmth in the cold. A good base layer wicks away sweat so you don’t end up stuck in wet clothes. Merino wool is a natural fiber that, in addition to providing ...

Long underwear — a.k.a. long johns, thermals, base layers, or whatever else you want to call the cozy, body-hugging tops and bottoms worn beneath looser clothes in cold weather — is my favorite way to ...

Maybe Grandpa had it right after all. After a generation's infatuation with long johns made of petroleum byproducts, the outdoor industry in recent years has been rushing back to its first love, wool.