I haven't tried one of their packs (partly because internal frame packs are too hot for me), but I have used their belt and shoulder harness. The belt didn't work for my purposes, but it's a good belt for an internal frame pack. Their shoulder harness is the best and most comfortable I've used and I've used a lot of them. I use it on my Outdoorsman frame and have used in on other frames as well.
Could you post pics of the harness on the outdoorsman frame? Would love to see that. Thanks
