This is an extremely large backpack/trauma bag made of Cordura® nylon. The main compartment measures 20" H x 15 W" x 7" D, is padded with closed cell foam, and has a #10 YKK heavy duty self repairing nylon zipper. This bag has 16 pockets and compartments. On the outside back is a 15" x 8" gusset pocket and a 15" x 10" x 3" zippered pocket. The two side pockets and top pocket each measure 15" x 5" 21/2". The inside consists of 4 removable flat pockets, 4 pouch pockets, and 2 flap pockets. The main compartment has sewn in Velcro® straps and for securing contents. This pack has a web carrying handle contoured shoulder strap with chest and waist straps. A false back allows for storage of shoulder straps when not needed. 3M™ Scotchlite™ Reflective Material "Star of Life"