Fabric Cannonball® Flame-resistant, 13 oz./yd², Duck, 100% Cotton; Nomex® taped brass zipper fly front; Knee-high leg zippers; Elastic in straps; Non-conductive heavy-duty release buckle; Two large front bib pockets with pencil stall; Two set-in swing pockets; Watch pocket; Two large hip pockets; Double tool pocket; Side vent openings with snap closure; Front leg reinforced shin to thigh; Arc Rating ATPV 16 calories/cm²