This flight coveralls use 240 grams of pure cotton flame retardant fabrics washed 50 times still comply with national and international standard of flame retardant, fabric thickness is moderate, good ventilation, heat dissipation effect, can make the workers work to avoid strong winds high in the sky into the body and to keep the body warm, also can make them in special cases against the threat of a high temperature. https://factoryworkclothes.com/fr-coverall/