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 ...

This 208g midweight merino bottom base layer is seriously warm and well-constructed, with flatlock seams meant to be comfortable under baggy jeans or insulated snow pants. The flat, high waistband ...

The North Face Summit Series Pro 120 Crew: first impressions . A thermal base layer is an essential piece of kit for anyone ...