The ABU Hercules 3 Day Pack by Military Luggage Company is a truly functional pack for members of the United States Air Force. Some of its great features are a heavy duty carry and drag handle, external side compression straps, two double zipper pulls on the main compartment for easy access, grommets on all compartments for drainage and an individual foam pad back panel for extra comfort and maximum airflow. There are body contour shoulder straps with D-Ring for equipment attachment, sternum strap and waist belt. There are a total of seven compartments. The main compartment has gear straps to secure gears and two extra mesh pockets. The second compartment contains three map/document pockets, two radio pockets and penholders. There are two large pockets on the back, bottom pocket (12.5" x 6" x 3") with 3 elastic closure mesh pocket and a zipper mesh pocket. There are two side pockets (9" x 5" x 2.5") on each side. Finally there is one compartment for hydration systems. The Hercules 3 Day Backpack is tough, rugged and built to last.