Leader twist has long been one of the biggest pain points in streamer fishing. Many streamers are designed to swim a certain way, hook-point-up, hook-point down, etc… So if your leader twists up, the fly won't swim correctly to get the reaction you want from your intended target. But by simply adding in a barrel swivel, you can make sure your fly swims the right time, every time.
Tippet: Match it to your situation. If you need any help check out this article about choosing your leaders and tippet to match your fishing situation.
How to Build Your Leader
Step 1: Tie a loop knot in the thickest end of your tapered leader if there is not already one there. We like to use a double figure-8 knot or a perfection loop.
Step 2: Cut the leader 7 feet down from the loop knot and tie the tag end to the barrel swivel.
Step 3: Tie your tippet of choice off the other side of the barrel swivel.