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 and most popular fly line backing in the world. The quality product Leon designed has only been made better with technically advanced braiders and high pressure color dying. Colors: Bright Orange, White or Fluorescent Yellow/Green Spools: 50, 100, 150, 1200, 2500 and 5000 yd. Tests: 12, 20, and 30 lb.