The RIO (R) Fly Line Backing is a traditional Dacron braided backing that provides high strength and low stretch. This backing offers a good compromise between thinness and the ability to make blind splice loops. The RIO (R) Fly Line provides you with quality backing and it allows you to knot easier compared to other lines that are too thin. FEATURES: Traditional braided backing High strength and low stretch Good compromise between thinness and ability to make blind splice loops Make easier knots compared to other thin lines Color: Chartreuse RIO