What is an essential characteristic of a personal flotation device (PFD)?

A personal flotation device (PFD) must be certified for use on boats to ensure it meets safety standards set by regulatory bodies, such as the U.S. Coast Guard. This certification indicates that the PFD has undergone testing and meets specific performance criteria for buoyancy and safety in the water. It is crucial for PFDs to be approved for use because they play a vital role in preventing drowning and ensuring the safety of individuals while engaging in boating activities.

While being brightly colored can enhance visibility in emergencies, and inflatable styles can offer comfort and convenience, these features are not universally required for all PFDs. Similarly, materials used for a PFD, such as foam or other buoyant substances, do not include wood as a necessary characteristic. Thus, certification is the key factor that guarantees a PFD is safe, effective, and appropriate for boating activities.