This multi day hiking backpack has proven to be tough over the years. All the toughness does add up to 5 lbs (empty) and that can be a bit heavy for some.
The backside is designed to minimize (if not eliminate) back sweat. It has been wonderful hiking with this backpack during humid weather. Customizing this bag to rest on shoulders, hips, or both is easy and very helpful during long hauls.
There are plenty of places to clip on your additional gear such as tents, sleeping matt, additional bags, sacks, guitar, whatever. There is a specific place on the bottom for the tent where it gets attached tightly to the bag to prevent from swaying. Very useful!
You like to carry lots of water with you? This bag got you covered. You have 2 side pockets for water bottles and a water bladder pouch on the insider (I use 3L water bladder in it).
The big outside compartment allows you to store items that you dont necessarily want to put next to your hoodie or sleeping bag. Items like your garbage, axe/shovel, dirty shoes, etc.
If rain rolls in on your parade, this bag comes with a rain cover that you can pull out from under. The bag itself is already decently protected against light rain but if the rain gets heavier, Im happy to have the cover for better protection. I also use it when storing the bag outside the tent overnight.