Wow, kind of fancy and expensive for just keeping your pants clean! Might as well just saddle up.
Have to say first that I am not a real fan of the manufactured saddle pad products. ESPECIALLY those with stirrups because of the probability of the pad slipping sideways under a rider’s weighted foot. Seen it happen, had it happen to me. Girths don’t stay tight, maybe unable to be tight by the design of the “bareback pad” with no tree. While the design of the Trail Lady pad is interesting, those plastic snaps scare me with possibility of their failure. Girth is not buckled or tied on. Have seen those kind of snaps just straighten out when pulled hard, stressed. And having stirrups? Makes it a no-go for me to recommend for using. Add in those full saddle bags, so horse may also have flapping items, with unbalanced loads to help pull things sideways during the ride time.
Get out the saddle and do things properly, prevent an accident, protect his back, have your supplies firmly in place for the ride instead of trusting these “bareback pads”. Name is a completely false description of what they are.
We use a saddle pad or saddle blanket on a bareback horse for riding to keep our pants clean. However I just use a western cinch and leather latigo to keep it on. Kind of an overgirth around the barrel of the horse and blanket/pad. Latigo is easily tightened enough and as needed, to prevent blanket/pad slipping in use. Plenty of coverage to prevent sweat from horse with the saddle blanket. Rider stays on with balance and skill, develops their close contact with horse during the ride. Yes you do have to get on horse with a mounting block or jump up. No temptation to mount with stirrups when they are not there! Without a tree like a saddle, stirrups are a bad item to trust with mounting weight all on one side of horse. Pad is going to turn on the horse.
These pads posted, have no appeal to me to buy them. They are really just saddles without trees. Lot of money to spend on something like that.