Well, I got the HSS. It is not the pro, but the one just below it. I realize now that what I have is last years model. It does not have the "seat" harness. The straps tend to go between your legs as opposed to going wide and under the butt. A friend thinks we can fix this by tying webbing or paracord to it. Anyone done this with success? I think I will do this to direct the webbing away from my crotch area. . .