The Summit packs are built to carry the heaviest of loads and were designed with guides in mind. They use a minimalist approach in design and you won't need your knife to cut off anything unnecessary. Check out the details like Noggin Notch, tuck away bottle pockets, Mitt friendly zippers and a great front grab handle. The Summit's have the Torso Motion frame and hipbelt to manage movement and balance and also features the Torso Micro Adjust to customize the lumbar area. The Adjustable lid and 3 compression straps, make this pack very versatile for carry different loads.