The Argon takes up position as Ospreys backpacking heavy weight. Support, fit & comfort are paramount when trekking with heavy loads, & these packs excel at providing all three. The Re Curve suspension system efficiently distributes weight while the Bio Form custom moulding hipbelt & Air Scape backpanel provide exceptional contact zone comfort. Trail versatility is maximized with Ospreys Straight Jacket compression system, removable ultralight Aqua Source, vertical zip access into main compartment, & stretch woven front & side pockets. These outstanding packs offer sized, gender specific harnesses & hipbelts to ensure a truly custom fit.