Thermal underwear is known by many names — long johns, base layers, long underwear, skivvies, or even britches (for my Southern friends). No matter what you call them, they are a staple for anyone ...

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 ...

Tech Features: Smartwool Intraknit Max Thermal Merino Base Layer combines advanced Intraknit technology with 100% merino yarn for superior insulation, moisture management, and thermoregulation.

Naturally, their thermal underwear follows suit ... they’re making a play for what you wear underneath it, too. Their latest base-layer bottoms are built from a performance-driven blend of ...

Between December and March, I rarely leave the house without a base layer (or thermal underwear, as some call it). I will wear thin tights under my business attire, wooly garments under my jacket and ...