The Neptonics line keeper pouch is the perfect solution for managing your monofilament rigged speargun shaft. It ensures that the shooting line stays compact and untangled. When hunting tuna, we use these with our back-up shafts and cable when we are putting multiple fish on the boat in rapid succession. The clear plastic window allows you to view the shooting line. It's also a great product for when you are traveling. Made out of Mil Spec Nylon and heavy-duty Velcro, these pouches are sure to last.