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.
Good base layers should be formfitting — not tight ... “It wicks moisture away from your body, which also makes the clothing extremely breathable and odor resistant.” On a basic level ...
Thermal underwear is known by many names — long johns, base layers, long underwear ... Since we demand so much versatility from such a simple piece of clothing, I put all kinds of thermal underwear ...
In Nordic regions, they have an old proverb that says: There’s no bad weather, only bad clothing ... ever since I discovered the merino wool base layer, I’ve been able to stay out longer ...