Hygroscopic heat generating thread on the skin heats up moisture from the body and generates heat. Warmth keeps warm because it keeps heat with the air layer of the skin side pile structure. It is a material hard to chill sweat even during the winter cycling break. It is excellent in perspiration by the capillary phenomenon of the pile structure part, it suppresses stuffiness and sweat chilling, so it is a hygroscopic exothermic material that keeps dry comfort.