A cryogenic freezer is a specialized device designed to store materials at extremely low temperatures, typically below -150 degrees Celsius. These freezers are commonly used in laboratories, medical facilities, and research institutions to preserve biological samples, such as cells, tissues, and embryos, ensuring their viability for future use. The technology behind cryogenic freezers often involves the use of liquid nitrogen or helium to achieve and maintain these low temperatures. By slowing down molecular activity, cryogenic freezers help prevent degradation and preserve the integrity of sensitive materials, making them essential for fields like biotechnology and pharmaceutical research.