350gsm black fireproof cotton flannel fabric for FR sweatshirtConstruction: 1*1 single fleece Fiber Content: 100% Cotton Yarn count: ... 32s*10s Weight: 350gsm ± 10gsm Treatment: THPC durable FR finish, ... is popular item, it is breathability,comfortable, used for FR sweatshirt, FR pullover, FR coat,for welding,Oil & Gas, firefighting, Steelmaking, ...