Yep if over 40lbs is uncomfortable then that frame isn't for you. I did my first backpack hunt this fall and did 20-30 miles with 60-65 lbs on my Kifaru and was fine, and I'm not in shape (better now than I was a few months ago though ha). I'd looked at Kuiu, SG, Seek etc for a lighter pack but I love the customization of the Kifaru. I have a Reckoning, Guide Lid, Grab It II, 2 Medium Pockets, 1 Large Pocket, Organizer Pocket, Spotting Scope Pocket, Nalgene Holder, a Native, and a 26" Hunter frame. I can configure so many ways it's crazy. Love playing with it. Currently running the native without a frame for a treestand pack, added my nalgene holder, a medium pocket, and the organizer pocket to the PALs on the front of the pack.Can set up the Reckoning for anywhere from a gear intensive day hunt to up to a 12-14 day backcountry hunt.