Folding a streamer creates more aerodynamic drag than a typical rolled up streamer. This allows the rocket to fall slower to the ground. It is used most often in competition style model rockets. It can also be used in the Team America Rocketry Challenge (TARC) contest where you have to have your egg capsule come down separately. In part one, you'll see how to fold the streamer accordion style. In part two, you'll see how to attach it to your model rocket.