The bestselling backpacking series on the market just got even better. Known for its ability to be taken all over the world, from the summit of Everest to a backpack trip through your local wilderness, the fourth generation of Aether/Ariel builds upon its reputation for combining clean design, custom fit and outstanding load carrying comfort. Amongst a plethora of upgrades, the new IsoForm⁴ CM™ hipbelt adds stiffness and padding for even better performance with heavy loads. Amazingly, all this comes with no increase in weight