The key to the Outdoorsmans Pack System is the frame. The curvature allows the pack to ride as close to your center of gravity as possible. This gives you the stability of an internal frame, but the carrying capacity of the external frame. The polypropylene frame is rigid enough in the vertical plane to handle a 200 lb. load, yet is flexible enough to twist with your body while climbing or slipping through brush. The bag is attached to the frame at eight different points with easily inserted buckles. Behind the bag is a meat carrying system that is tucked neatly against the frame so you can convert your gear bag into a meat packer in less than two minutes.