To provide a winterized flying jacket with superior waterproof performance during accident and exothermic property during absorbing moisture or water, with superior dew formation preventing performance and workability and suitable to a cold district. 事故時の防水性と、吸湿もしくは吸水時の発熱特性に優れ、かつ結露防止性、作業性に優れる寒冷地に好適な防寒飛行服を提供する。 - 特許庁