Material: 60% cotton, 40% polyester, ripstop 7 oz; Oeko-Tex 100 certified; Stretch panels; Pre-bent knees; Cordura reinforced nail pockets, back pockets, ruler pocket, leg pockets, knees and hem; Cordura reinforced side pocket for ruler tape; Plastic zipper fly; Loops, one with D ring; Inside leg seam with double stitching; Blaklader embroidery back; Knee protection pockets with two placement level options and velcro closure; Ruler pocket reinforced with Cordura, Ruler pocket with extra pocket, Ruler pocket with pen pocket; Back pockets with bellow, reinforced