The fiador knot is used to make bridles for horses. It has other uses as well. There is one upper loop and two lower loops that can be made any size. It can be hung from a belt or any appropriate place. The sliding knots I added to the lower example clamp down snugly on flashlight, water bottle, or whatever.





For a tutorial see
http://pineapple.myfunforum.org/about1942.html