FRB159 - M FR Canvas Pant Carhartt's flame-resistant loose original fit midweight canvas pant is great for warmer weather. Made of 8.5-ounce flame-resistant canvas, an 88% cotton/12% high-tenacity nylon blend, it has a loose seat and thigh and sits slightly above the natural waist for a comfortable fit. The brass zipper fly has Nomex® zipper tape and the high-tension waist snap closure is arc resistant. It also has a cell phone pocket, utility pocket, left leg hammer loop, triple-stitched main seams, and a leg opening that fits over work boots. Meets the performance requirements of NFPA 70E and is UL® Classified to NFPA 2112