This middle weight fabric have two side clear twill Weave:, can be made as Spring and Autumn seasons shirt/ jacket/ trousers/ coverall etc., mainly used in oil & gas/ chemical/ gas station/ mining/ welding/ repair such field for making fire fighter suit/ first aid suit/ welder work wear. Adopting very welcomed natural fiber cotton fabrics, matched up with Yulong practiced FR craft, self-extinguishing when facing the fire, without molten drop, char length can be controlled within 10cm, soft touching, good strength, good wear resistant property. Formaldehyde content can be controlled within 75ppm which is better environmental protection, prevent human body from hurts. This high strength fabric, can reach more than 30N, flame retardant property good, and washing durable time is more than 50 times.