The Snorkel Buoy is a bright color marker that you can slide over your snorkel tube to provide high visibility in the tropics or local waters. It is a great idea to have in heavy boat traffic areas for extreme visible, allowing boaters to keep clear and not create a life threatening situations. Some tropical areas even require it if you spend anytime diving while snorkeling. The Snorkel Buoy is made from buoyant foam material in a traditional red & white diver down flag or for night and low light snorkeling conditions a glow-in-the-dark version. The Snorkel buoy is easy to pack for travel being compact and light weight.