Main fabric: 79% Cotton 18% Polyester, 3% Elastane, 265 g. Second fabric: 65% Polyester, 35% Cotton, 310 g. Reinforcement: 100% Polyamide, 195 g. YKK zipper. Plastic covered metal buttons. Thigh pocket with flap for accessories/tools. Two back pockets, one with flap and Velcro closure. Ruler pocket with double bottom in Cordura® fabric. Broad center back belt loop for extra stability & strength. Gusset at crotch. Reinforcement at knee and bottom leg. Knee pad position can be adjusted +/- 5 cm for better fit. Fold at bottom hem with the option to extend the length by 5 cm.