I bought a HSS vest about three years ago, and I think I've worn it maybe half a dozen times. Every time I wear it, I remember why I don't wear it. For the life of me, I can't understand why they thought they had to put seat belt buckles on the leg straps. It makes it way to heavy and those buckles will hit stuff and make noise. I just bought a Seat of the Pants harness and I'm liking it a little better. I'm trying to make myself get into the habit of using it.