Whether you're spooling up a reel for your old-school fiberglass rod or looking to save a few bucks that you can put towards your next road trip to Montana, the Scientific Anglers Frequency Double Taper Fly Line is the line you're looking for. The line's cost-effective double-taper design can be flipped around once one side wears out, and the versatile mid-length head delivers in a variety of casting situations.