Like M_Wyatt and Snowcamoman, I spent a little time with a X curve frame and the new 5900 bag.....It seems like the new frame transfers weight to the hips more comfortably and the cupping action of the belt adds a ton more comfort. The dual pulls on the belt have a lot to do with it but I also think the stiffer belt-to-frame interface plays a huge role.
I also think the forward pull belt is a great addition as well. It cinches down and stays put.
I also think the forward pull belt is a great addition as well. It cinches down and stays put.