This is what did it !! I wore one of these at my gym session this morning. It had a 6 kg weight in it and by the end of the hour I was ready to just rip and tear that thing off. The weight was not so much the issue but the intense heat it generates when worn and when finally I could yank the dreaded thing off it was not a pretty sight. The three of us who were lucky enough to enjoy this experience looked as though we had just stepped out of a shower fully clothed. We were a trio of sweaty Betties !! At one stage I had a rubber power band around my ankles, one around my wrists, the dreaded vest on plus I had to do squats like this with 2 orange kettlebells. I could barely breathe after 3 sets encumbered by these accessories. Today certainly took my weight training up a notch.