Made of linen and leather. This classic look comes standard from the Czech Army with two massive external pockets measuring 7" wide by 8" tall and 2" deep. Those pockets and the main compartment all secure tightly with a strap closure. The pack itself measures 16" x 16" and 4" deep at the base. There is a separate inner compartment spanning the width of the pack as well as a drawstring closure up top beneath the lid. The detachable straps are part of a larger system and can easily be fitted permanently with carabiner clips, zip-ties or paracord. The shoulder harness may show some signs of wear. A well-made pack at an unbeatable price for sure!