Cryo-Babies cryogenic labels are constructed of flexible polyvinyl and feature chemical-resistantce. Labels withstand temperatures down to -196°C and adhere to plastics, glass, and metal. Mark using any writing instrument. Suitable for autoclaving, boiling, water baths, or dry heat up to 150°C without peeling, cracking, or degrading. Lables can survive soaking at room temperature or 100% relative humidity at 35°C for at least 24 hours.