Made of 13 oz., 68% cotton/32% modacrylic denim. Relaxed fit in the seat, thigh and knee for added comfort. Features authentic 5- pocket styling, high quality brass zipper with Nomex® (FR) zipper tape, and wider legs to fit over boots. Arc rating: 13 cal/cm², CAT 2. NFPA 70E and NFPA 2112 compliant.