Icicle

The Icicle is another arborist knot. I've read that it holds well, but I haven't had much luck with it. The various coils seem to bind on each other rather than tightening and subsequently loosening easily like I would like. I could probably get better results if I played with the sling materials and diameters, but this knot seems to be fussier than most, much like the Spong.