Heavy-duty, expanding file with 21 pockets is made to resist everyday abuse and transport letter-size documents safely. Double-reinforced flap with a hefty elastic cord provides added security. File also includes extra-thick covers and rip-proof Tyvek reinforcement at gusset top and corners. Preprinted, double top-tabs are aligned in a straight line for easy viewing. 1/3-cut tabs are preprinted A to Z.