For those who haven't heard of him, Lefty Kreh is an American angler and is regarded as one of the people who redefined fly fishing in both salt and freshwater. He is most famous for his casting skills and writings on presentation and saltwater fly fishing techniques.

I use this loop knot for all of my lure and most of my fly connections. A loop knot connection is essential for small minnow lures to ensure they swim correctly, and I have also found it handy for small soft plastics, both on jigheads and unweighted, as it allows much more freedom of movement.

To demonstrate the knot, I used pink mono (for clarity). I also made the loop a bit bigger than I normally would, though this can be something of an advantage if you are fishing for toothy predators such as flathead or tailor, as it provides something like a short double for extra protection. This guide to the Lefty Kreh Loop Knot was originally done for the Illawarra Flyfishers website, so I used a Polafibre Minnow to demonstrate it, as shown below: