FR Long Sleeve Shirt button front chambray work shirt. Fire resistant clothing for flame and spark protection in industrial or electrical work areas. Protective clothing FR work shirt is made of 7 oz, 88% cotton and 12% High Tenacity Nylon that has a HRC Level 2 and ARC Rating of 9.2 which is a standard for flame resistant clothes. These shirts are made to last with their triple stitching throughout its whole construction. The button down color is secured by small in-intrusive melamine buttons and has two chest pockets with pencil slot.