NRAM is made of carbon nanotubes that are more efficient than the current technologies used in 3D XPoint and NAND Flash devices. Nantero - the company developing NRAM - claims that its technology can provide better write speeds for decreased power requirements and production costs, and the memory has high temperature tolerance (up to 800 degrees Centigrade).
https://www.notebookcheck.net/Fujitsu-will-begin-Nano-RAM-production-in-2019.315980.0.html