he Mainstream Trout Intermediate makes it easy to get started with exciting wet fly, nymph, or streamer fishing. Whether it's precise casting, lightning-fast strikes, or sensitive fish control, this translucent line is a reliable partner that helps fill your net. Whether you're on a stream, river, or at the coast, the Rio Mainstream series covers all areas and techniques across its line classes. Each Mainstream line undergoes the same strict production processes and quality control standards as all RIO fly lines and is manufactured at RIO’s facility in Idaho. Details: Affordable, high-quality fly line Slightly heavier line for a wide range of applications Easy to cast and control Short, powerful front taper for good presentation and easy turnover Sink rate: 1.5–2 inches/second (3.8 cm–5.1 cm) Ideal for beginners and newcomers Intermediate line Color: Clear