base layer
base layer — noun
1. a shirt, leggings, or similar item that sits closest to the skin beneath your no
a shirt, leggings, or similar item that sits closest to the skin beneath your normal clothing, using special fabric so that your body stays warm and any sweat moves away quickly.
Eve pulled a thin base layer over her arms before the morning ski lesson.
worn under outer clothing for warmth
A good base layer keeps cyclists dry by pulling sweat away from the skin.
subject is the garment; function described
The hikers packed wool base layers because the mountain nights turn very cold.
Before the match, Dario tucked his base layer into his shorts.
Runners often choose a light base layer that fits snugly against the body.
- thermal
informal; usually plural ('thermals') for warmth-focused underwear
- underlayer
broader; any layer worn beneath, not always sweat-wicking
- outer layer
the garment worn on top, exposed to the weather
用法筆記
Subject of warmth language is the garment itself; it is described as a function (keeps you warm, moves sweat) rather than as a fashion item. Common in sport, outdoor, and clothing-shop contexts.