These are known by other names. Emergency blanket and space blanket (surprise, surprise). Developed in 1964, this insulation technology not only created a way to keep people warm, but also has been responsible for preventing equipment from malfunctioning due to temperature-related issues. In 1973, a parasol-type shield was made using the same insulation material to save a spacecraft that lost a heat shield. It was installed so the spacecraft wouldn’t overheat. Despite its slim design, these blankets have saved countless lives, especially in times of disaster.
Run, Run, Run as Fast as You Can: If you ever watch a marathon race, consider this: runners who finish the race in chilly conditions are wrapped up in emergency blankets. That’s because the runners will have a post-race chill settling in their body. It takes an average of 20 minutes for a runner to get into much warmer clothing. That’s enough time for hypothermia to settle in. Instead of risking something dangerous, they will instantly get warmer using none other than a good old-fashioned foil blanket.