Thru-hiked the PCT in 2016 with the 3400 HMG Southwest and it treated me well. Planning another thru-hike and am looking into alternatives.
Requirements:
- Must transfer loads to my hips as well as or better than my 3400. This presumably precludes frameless packs. In any case, I use a NeoAir, so using a CCF pad as a frame is not an option. I have a light base weight, but trying to haul from KM to VVR in one go is heavy, as are some of the desert water carries.
- Must be no heavier than my HMG. If it is approximately the same weight, it must have a better suspension / weight carry capacity.
- Prefer for it to be waterproof.
- The 55L internal/10L external was a good size, but I would consider going slightly smaller as I will be sharing gear this time around. Still, not too much smaller as I need to carry a bearcan and be prepared for long food hauls.
Is it easy to compare backpack capacities based on their listed liter volumes, or is HMG known to be small/big?
In my quest so far, I’ve come across the SWD Long Haul 40L and 50L, which are 8-10oz lighter than the HMG and seem pretty similar. Any thoughts on these packs in particular vs. HMG, or any other suggestions that meet my above requirements?
Also willing to pay for a custom-made backpack (I’ve heard the name McHale), but don’t know much about the custom backpack market or whether they use cuben fiber and other lightweight materials.
Thanks!

