Many SB flyers use SoLite (Solarfilm Lite). I believe Nelson film is the same stuff. It is a great product. You can get it from Doug at MM. It's a little tricky to separate and then keep separated from itself, but once laid on the framework, it's a joy to work with. It's about as light as you can get and have color. Here's mine (if I did it right!) Good luck, Dzl