The Tube Fly Box is designed for a specific purpose that traditional fly boxes often fail to address: storing tube flies without cramming them together or mixing them up. The transparent case allows you to quickly identify the right selection before opening the box, which avoids having to rummage through the entire contents while you’re at the water’s edge. The 5-compartment version is designed to organize several sets of short or medium-length tubes in a single format. The 3-compartment version provides more length for longer flies, particularly large patterns like the Sunray Shadow. The choice therefore depends less on the size—which is the same—and more on the length of the flies you need to carry.