Perform CPR (Instructional Safety Sign). Our CPR Instructions are kept up-to-date with the American Heart Association Standards and Guidelines. This sign is a lightweight, durable, weatherproof indoor or outdoor sign printed on white styrene (plastic). This swimming pool and facility pool sign is designed for harsh swimming pool and outdoor environments. It includes a brass grommet in each corner for easy hanging or mounting. This sign is printed using our high-quality weather and sun resistant inks.