The image above diagrams a typical 100’ saltwater fly line. Note that the 30’ “head” of the fly line is thicker than the remaining 70’ of “running line”. It is the “head” of the fly line that is weighted. When “loading” a fly rod, you are working with the “head” or the first 30’ of the fly line. The “running line” shoots out following the head when you make your cast.
Fly lines come in various configurations starting with “weights” to match your fly rod. Floating lines, intermediate lines, sinking lines, and are just some of the choices available for various fishing situations. For inshore striped bass fishing, I like to keep it simple with a versatile and easy to cast intermediate line. Ask your local shop to recommend a good line. Yes, it will cost you $100, but fly casting is ALL ABOUT THE FLY LINE!