heat-retaining slip

noun
UK /hiːt rɪˈteɪnɪŋ slɪp/
US /hiːt rɪˈteɪnɪŋ slɪp/

A slip is a small piece of clothing you wear under other clothes, and heat-retaining means it keeps your body warm.

She wore a heat-retaining slip under her dress on the cold winter day.


OTHER MEANINGS

2. A thin layer worn under clothes that traps body heat to keep a person warm.

The heat-retaining slip kept him comfortable during the chilly hike.

3. A garment designed to hold warmth close to the skin without adding bulk.

This heat-retaining slip fits smoothly under any outfit.

4. A piece of thermal clothing used as a first layer in cold weather.

Pack a heat-retaining slip for your trip to the mountains.