Our cryogenic and deep-freeze tags are designed to withstand prolonged storage in low temperature conditions, including in liquid nitrogen tanks (-196°C). This includes hang tags for identifying metal racks used in liquid nitrogen Dewars and lab freezers, as well as adhesive-free tags for identifying various PCR containers for low temperature storage. PCR-TagTrax® is thermal-transfer printable, while Cryo-ID-KIT tags are provided with writable labels.