My rational for going from the Atmos 50 litre (L) up to a pack that has 61 litres capacity was simple. I can do simple. The Exos 58 (L) is lighter than the Atmos 50 (L). The larger capacity Exos can allow me to transport a larger load than the Atmos. The Exos can be compressed down so that there is no excess material.
I’ve had the Osprey Atmos since 2006, and it has been my overnight pack, my weekend pack, my long-distance-walk pack (West Highland Way, Southern Upland Way). It is very comfortable, and a great load-carrier. But I’ve often had to strap the Akto’s fabric on to the outside of the pack in it’s compression sack. It just doesn’t look nice. I don’t go climbing, so am not concerned about dragging my pack up cliff-faces on the end of a rope.
First impressions of the Exos. Light. Straps are thinner. More ways to pack items on the side. Belt pockets seem easier to reach. Pocket under the lid is useful, and is now home to a XSS Exped waterproof bag.
I don’t like the official “backpanel sleeve” for hydration bags (loads move as the bag is emptied), and hung mine from the wee strap in the main compartment, and down through the zip into the frame space. I did this on the Atmos, however that was designed to do it, the Exos is not. The zip in to the airspace compartment is on one side only, so cannot fully close (hmm, not neat).
The manual is up to the usual high standard, and the whistle is still present on the chest-strap (and confuses birds no end).
More to follow over the Summer.