Mylar

Mylar is a brand of polyester film made from stretched polyethylene terephthalate which has a wide range of applications due to its strength, chemical and dimensional stability, transparency, reflectivity, insulation and other properties.

On 16 December 2143, an unpeopled satellite was blasted out of low-Earth orbit by an NAU missile. It had been trailing a Mylar banner approximately one mile in length bearing the text "Free Kyle Swann".