Airflo® Micro Poly Backing
Airflo’s Micro fly line backing is a Braided Polyester that has an extremely low diameter, low stretch and is 100% rot-proof. The super smooth braided backing sits flat on your fly reel or spool, allowing you to pack as much fly line backing onto your reel as possible. With an extremely high knot strength this is the perfect option for filling your fly reels.