Streamers are used on rockets that fly high and would otherwise drift away if they used a parachute. The Apogee Aspire kit is a good example of a rocket that would use a streamer instead of a parachute.
Our Mylar® streamers shine like a mirror, and are coated with a bright color (actual colors may vary) to make them easy to see in the sky and on the ground. When the sunlight hits them, they make the rocket sparkle, so that they are easier to see as they descend to the ground.
These streamers are 56 inches long, and are 1 mil thick, so they are intended for mid-power rockets (A,B,C, D, E, F motor sizes). They are great in small competition rockets. They are available in either 2 or 4 inch wide sizes.