The Flybrary of Congress Fly Box is a large fly box that we love to use in a variety of ways. As a boat box this large box will handle a large quantity of good size flies like bass flies, poppers, streamers, bonefish flies, permit flies and tarpon flies. We use these on both our freshwater and saltwater fishing trips. Use it like a mothership box for your saltwater flies or a large streamer box for drifting your favorite trout and smallmouth bass rivers. With its clear tops of both sides of this double-sided box you'll be able to keep track of what you have with you easily. Made from ABS this box is not only tough but waterproof. One side of the box is built a bit deeper to fit really big flies.