fleece
n. C / Un. a soft, warm material used to make jackets and blankets, or the thick woolly coat of a sheep. You often wear it when it is cold outside because it keeps you very warm.
n. the woolly coat of a sheep or similar animal; also refers to a soft, synthetic fabric with a deep pile used for thermal insulation. Uncountable when referring to the fabric; countable when referring to the wool of a single animal.
I bought a warm fleece for my hiking trip.
The farmer sheared the sheep's thick fleece to prepare the wool for spinning into yarn.
Advancements in textile engineering have produced synthetic fleece that mimics the thermal properties of natural wool while offering superior moisture-wicking capabilities for high-performance outdoor activities.
Uncountable when referring to the material or fabric; countable when referring to the woolly coat of an individual animal or a specific garment.