All belts that I know of should have power pulls and pull forward. The only one I'm not 100% sure of is the old single row PALS ones, but I think they did as well. The design has changed recently however and the older one could've slipped out making you think it's not. The older design should have 2" common loops on the ends of the padded part of the belt through which you feed the belt straps through and the center buckle is what grips the belt. The newer one (within the last 4 months or so) has 2" ladder locks on either side that grip the belt and the center buckle lets the straps feed through freely. I have both on different packs in my car; I'll take a picture tomorrow and post them. Even back to the old ZXR and Longhunter there was a powerpull system, so it's been around for a while.