Im 21 yo and my posture is actually shit - head forward, looks like im developing a hump and also one of my shoulders is higher than the other. When i put on a two strap bag, it slips off of my left shoulder.
When i try to walk with a straightened back, i get back aches sometimes upper sometimes lower back.
Have any of you used these? Do they really make your posture at least a bit better or is it just a scam?