The Non-Slip Mono Loop

For many flies, a loop knot is preferable for attaching the tippet. A loop does not torque the fly sideways; and with heavier tippets, it allows the fly to move freely in a more life-like manner. This loop is easy to tie, near 100% strength in virtually all tippet sizes, and does not tighten down on the hook eye with pressure (like the Duncan loop). Like all knots, it must be tightened completely - use pliers with heavy tippets.

This is a slightly different method of tying the knot. The best-known version is from Lefty Kreh/Mark Sosin. According to my tests, this version is stronger. Test `em yourself. 

A - Tie a simple overhand knot in the tippet and run tag end through the hook eye. B - Run the tag in back through the overhand knot in the OPPOSITE DIRECTION that the tag end exited from the original overhand. C – Wrap the tag end around the standing line 4 times. D – Run the tag end back through the overhand knot in the SAME DIRECTION that it exited the previous time. E – Lubricate and tighten the knot by pulling on the tag and/or the standing line. Pulling the tag end will decrease the loop size, while pulling the standing line will increase the loop size

Thanks to Joel Daniel for the knot sketch.
And thanks especially to Bill Nash  for his book, Flycasting Systems, and these tying instructions - don't know if he devised it, but that's where I learned.

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