Expanded polytetrafluoroethylene, or ePTFE, can be found in Gore-Tex jackets, waterproof shoes and even laptops and firefighting gear. Created in 1969, it's water resistant, extremely strong and has a huge thermal temperature range. When blended with an insulator called Aerogel, ePTFE can help insulate against high temperatures.
But ePTFE can also withstand extremely cold temperatures. In fact, it’s being used in cryogen bags to store special, expensive biologic drugs so that they don't interact with the environment or degrade over time when stored in temperatures around minus -112°F (-80°C). Most materials lose their strength and fracture when subjected to these kinds of temperatures, but not ePTFE.