What type of pfd is designed to turn most unconsoius persons face up?

A Type I Personal Flotation Device (PFD) is designed to turn most unconscious persons face up in the water. It provides maximum buoyancy and is intended for use in rough, open water conditions. This type of PFD is typically bulky and equipped with features that help to keep the wearer’s head above water, making it ideal for situations where rescue may be delayed.