0 a piece of clothing worn under your other clothes, made of material that is designed to keep you warm and dry :
These stylish base layers are exceptionally warm for their weight.
Apparel companies are creating base layers that are thinner where you sweat more (under the arms and across the chest) and thicker in places that stretch out (elbows).
We found the fabric so comfortable against our skin that we wore it as a base layer.
Until recently, base layers tended to be synthetic, which made them effective at "wicking" sweat away from the skin but, after a while, smelly.
