Made of 9-oz, 88% cotton/12% nylon twill. Classic Fit style features diamond crotch gusset for ease of movement, knee darts for articulation, cell phone pocket on right leg with hook-and-loop closure and pen pocket. Back bellowed pockets with hook-and-loop closure on right, ruler pocket at back right thigh, cargo pocket on left thigh with hook-and-loop flap closure with pen pocket and bellowed cell phone pocket on top. A 20" leg opening fits over boots. UL® Certified to NFPA 2112; ASTM F1506; NFPA 70E; CAT 2; ATPV Value: 9.5.