... 4 grade We can manufacture permanent flame retardant workwear uniform (12/2*12/2), the details are following: Our company is professional factory ... , Denim, poplinSpecification7*7, 10*10, 20*16, 21/2*10, 30/2*8 etc.Weight130-450gsmtreatmentProban,Pyrovatex,FrecotexColorsRed, Orange, Blue, Navy ... retardant workwear uniform is less than 2.5%. And the color fastness is 3-4.5 grade. So our 100% cotton ...