I was looking at winter socks on youtube the other day and I came across one that was basically a big opening on one end with a taper at the other. The taper slipped on your ridgeline and you pulled the sock over you, cinching the wide end shut with a draw cord. I can't find the video again. Anybody know if that sounds like a commercially made sock. I just saw the same design on a watermonkey vid and it was made by papasmurf.