He doesn’t subscribe to UL so his gear is bulkier than most UL, so a 50-60 liter is a good size.
There are many reasons to go UL, but back problems are a major reason to go that route. Â A good suspension system will only go so far. Â I’m not sure if he’s ever seen x-rays of his arthritic spine but there are degenerative changes happening to the spine.
My first recommendation was initially the SMD Fusion, but the suspension system is so stiff that if your husband wanted to adjust it according to where his pain is, the SMD system doesn’t work that way. Â The SMD suspension transfers all the load to the hips and if your husband has lumbar arthritis, I wouldn’t recommend a stiff support like that.