Osprey ultralight Exos series has some serious weight reporting issues..
The paper insert in the Exos backpacks list the following weights for the MEDIUM sized Exos backpacks:
2 lbs 3 oz for the Exos 58 L,
1 lb 14 oz for the Exos 46 L,
1 lb 12 oz for the Exos 38 L
These weights are also listed on Backcountry.com (though it might change soon) and EMS and elsewhere online..
Sounds pretty light and good?
If you actually weigh these backpacks, you find,
2 lbs 8 oz for the Exos 58 L,
2 lb 5 oz for the Exos 46 L,
Not data on the 38L.
These are the weights listed on the Osprey website and on REI. It's also what you find when you put the backpack, sans tags, on a weighing machine (I did this for the 46 myself).
But it is NOT the weight listed on the pack itself in stores, on certain websites and on the paper insert inside the backpack I bought at a store.
Maybe I shouldn't obsess over 7 oz .. so the backpack I bought turned out to be 7 oz heavier.. big deal?
On the other hand, 7 oz??!! That's an extra heavy dinner + snacks!
Digression: I'll note that I do *love* the Exos with 25 – 30 lbs in it.. I'm a rail-thin 5'11" 27-year old guy.
I haven't tried on ULA or Granite Gear stuff.. did try out the Golite Jam in store briefly. The Exos is the right fit for me.
With a really bad distribution of weight, I felt the metal rod press against my back briefly but could adjust it to stop doing that. Can imagine it'd get pretty bad if it continued pressing against my back.
The Exos puts all its weight on my hips, none on the shoulders. The shoulder pads have the right amount of padding for me — nothing like more mainstream Osprey packs (Aether etc) which always bruised me. I'm not terribly strong and have a low tolerance for pack discomfort.. the Exos is a great option for me. The 46 ought to be enough for 4 – 5 day trips for me but would require careful and tight packing. I'm going to get the 58 (only 3 oz more) so I can use it for the winter and with bear boxes.

