Thermal fabric is a type of material designed to provide insulation and retain body heat. It is commonly used in clothing, blankets, and other textiles to keep the wearer warm in cold conditions. This fabric often features a special weave or structure that traps air, creating a barrier against the cold. Many thermal fabrics are made from synthetic fibers like polyester or nylon, which enhance their insulating properties. Some thermal fabrics also incorporate moisture-wicking technology, helping to keep the skin dry by drawing sweat away from the body. This makes them popular for outdoor activities and winter sports.