Tying a loop knot for fly fishing is essential for allowing your fly to move freely in the water, giving it a more natural presentation. One popular loop knot for fly fishing is the perfection loop knot. To tie it, form a loop in the line, then pass the tag end through the loop and make a simple overhand knot around the standing line. Next, pass the tag end through the loop again, this time above the overhand knot. Moisten the knot and pull both the standing line and the tag end to tighten. Trim any excess tag end. Practice this knot several times to ensure you can tie it quickly and efficiently while out on the water.

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Topics covered in this question:

Fishing Techniques Tying Knots Fly Fishing Loop Knot