Back in the 1950's legendary fly fisher Leon Chandler set out to create the best possible fly line backing available. Cortland's Micron Fly Line Backing remains the toughest, smoothest & most popular fly line backing in the world. The quality product Leon designed has only been made better with technically advanced braiders & high pressure colour dying. Cortland Micron fly line backing is a super quality, fine diameter braid & low stretch, it is also tough & smooth. Designed with a low-stretch factor that eliminates the danger of building pressure on your reel. Micron's very small diameter allows more yardage on your reel. Colour Available: White or Yellow