I pretty much agree with what was said above. Ivan works good in bad conditions.

It's a good bag for hauling big flat art, but carrying boxes with this thing isn't gonna happen easily. As far as fit's concerned, it's wide - doesn't constrict the chest when you're head down and hauling.

The roly-corners obstruct the vision a little if you've got it high up on the back but they start to bend inwards after a while. I do wish they had given the bag an easy-access pouch. Go to a surplus store and get an ammo or compass pouch. Attach to belt, harness, or chest-strap.