65% polyester , 35% combed cotton. Adjustable elasticated back belt with ring, holster pockets with two outer compartments. CORDURA® reinforcements, left thigh pocket, smartphone pocket. 2 compartments, djustable pockets for kneepads with flap and velcro closing tabs, ruler pocket with outside compartments, 2 pencil holders, holster pockets with large outside compartment, 3 extra compartments and 3 loops to hold screwdrivers etc.