On it's own, the F1 Mainframe is an excellent heavy load hauler, complete with comfortable padded shoulder straps and hip belt and an aluminum frame that is nearly bombproof. For the trek into your secret honey hole, add the 3,800 c.i. Little Big Top bag, and you are able to pack all your gear in for an overnight trip. Once camp is set, simply disconnect and use the Little Big Top as a stand alone day pack while on the mountain. Upon successful harvest, put cooled meat in a Zip-on Dry Bag and load gear in the Little Big Top, strapping both to the F1 frame for the heavy hike back to the trailhead. Additional accessories may be added to increase capacity and organization. Available in Mountain Camo.