A classic method of wing retention! Rubber bands are useful for lots of things, such as holding the wings on your parkflyer R/C airplane. We noticed that the rubber bands that come with the slow stick kits were a bit small, so we bought these high quality rubber bands. The red ones are longer, firmer and are in red, to match the color of the wings, while the tan ones are a little shorter, but are more stretchier, thanks to their purer rubber composition.