Have all your needs met no matter your fly-fishing level with RIO Mainstream Trout Double Taper Lines. These lines optimize your rod performance by using heavier and shorter head lengths. Every Mainstream line goes through a demanding production protocol to ensure durability and higher standards. The RIO Mainstream Trout Double Taper Lines have a slick coating with a supple core to help you catch that next big trout. FEATURES: Rio Double Taper fly line Slightly heavier than standard lines for easy loading Supple core Slick coldwater coating.