from each other. It can also be used to isolate a worn section of rope, where the knot is tied such that the worn section is isolated in the loop (which of course does not receive a carabiner nor bear any loads in this case). The loop portion is isolated when the other two legs are loaded, and in fact the butterfly can be tied as a bend with the ends emerging where the loop would be. Errors in tying the butterfly loop can produce a similar looking but inferior knot, the so-called "false butterfly", which is prone to slipping. However, some sources suggest this behavior can be exploited purposely for shock absorption. Wright and Magowan called this less secure loop knot the "half-hitch noose". Advantages Forms stable, secure loop after initial setting. Allows for the knot to be loaded three ways; by each end of the main line and the loop. Relatively easy to untie after loading (more difficult if wet). Size of loop can be adjusted more easily than with bulkier or more complex loop knots. Easy to inspect. Can easily be tied with gloves on. Can easily be tied one-handed. Disadvantages Difficult to tie around a solid ring or similar object, as when a rethreaded figure eight is needed. Improper tying can result in similar looking but inferior "false butterfly" knot. Works best with softer ropes. Variations The double butterfly loop has two non-collapsing loops, allowing for two clip in points, both of which have the same advantages and disadvantages of a single-loop butterfly. See also List of knots Notes and references External links Butterfly Loop Butterfly Loop animation Climbing knots Knots of modern origin