The Backing is Backing
Flyline Backing is the essential choice for most fly fishing needs. It goes on a fly reel first and has two purposes:
1. Provides an additional diameter to lessen the memory loops in the fly fishing line and increase the rate of line retrieval when reeling in;
2. Adds length to the braided fly fishing line for sometimes when a large catch runs out beyond your 90-foot flyfishing lines.
20lbs ideal for trout, bass, and general freshwater fishing;
30lbs ideal for salmon, steelhead, bonefish, and stripers.