Sherpa is a type of fabric that is known for its warmth and comfort. It is typically made from a wool or synthetic blend, and it has a thick pile that creates a soft and fluffy texture. Sherpa-lined clothing and blankets are popular for use in cold weather, as they provide excellent insulation. The term "Sherpa-lined" refers to items that have a layer of sherpa fabric on the inside, usually for the purpose of adding warmth and comfort.