i know what you are talking about, i have one its at least 18 years old. I use it all the time,and it still looks new.except the blood stains from dragging deer out. i put a 1x8 about as wide as my butt in it so i can stay in it a lot longer.use to cut off cirulation.
they don't make them any more. i think too many people fell out of them. there was something simalar too it a few yeas ago but i can't find that any more either.I thought it was a great idea, just wrap around your waist and off you go.light and simple. good luck, let me know if you find anything like it,,jeff