Airflo Micro Poly Backing still remains our top selling backing due to its durability, smoothness and low diameter. It is our preferred backing for use when loading customer's lines in store.
Fly line backing serves two basic purposes...
The first is to fill up your reel so that your fly line completes the filling of your reel to within, say, 1/8th inch of the spool capacity.
The second is to keep your fly line connected to the reel when a big fish strips of all your fly line!