This was Coleman's premiere backpack when it was introduced years ago. Today it is a much sought after classic. A flexible external frame allows quick and easy adjustment to the way it fits almost any backpacker. The main pack is divided into upper and lower compartments, for easy access without having to dig down through everything. And external zippered compartments on both sides allow for easy organization of specific items. Mesh back pad provides excellent ventilation. Top and bottom straps allow for attaching additional items such as tent, sleeping pad, etc. The photo shows me carrying this pack on the West Coast Trail just two months ago, loaded to 40 pounds.