Orvis fly line backing is braided Dacron on spools, precision processed with uniform strength. 20-lb. test is for trout, bass and most freshwater fly fishing.

This high-visibility fluorescent orange flyline backing lets you see the backing in the water when a big fish takes out line in a hurry. Tested extensively by Orvis' saltwater guides, who found the flyline backing helped them know where a fish was and when it was changing direction. The round Dacron backing won't rot or mildew and stores well on the fly reel.

• The Orvis Dacron fly line Backing is a top quality fine diameter super smooth braided line.
• 20lb backing is for trout, bass, and most freshwater fishing.
• 30lb backing is for steelhead, salmon, bonefish, stripers and more.