I have a Crescent 75 that I use when I have to haul heavy loads. It is an excellent pack but is heavy. Mine, including the removable fanny pack top and the small add-on pack for the center back weighs nearly eight pounds; about the same as a gallon of water. About the only time I use it now is when I need to haul more than two days worth of water and then I use it in stripped mode without the two additional "packs" in place.
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May I walk in beauty.