The Space Shuttle was the first reusable spaceship in the world. A total of six Space Shuttles were built: Enterprise, Columbia, Challenger, Discovery, Atlantis and Endeavour. Two Space Shuttles were lost in flight: Challenger (STS-51L) and Columbia (STS-107).
About 1'' triangle swatch of insulation material mounted on a 7x9'' rigid foam board certified on the backside.
The source of this piece of blanket is a scrapped part of the Shuttle by NASA.