What is most important when selecting the right PFD for a passenger?

Selecting the right personal flotation device (PFD) for a passenger primarily hinges on their body weight and chest size. This is crucial because PFDs are designed to provide adequate buoyancy and support based on the wearer's physical characteristics. Each PFD is rated for specific weight ranges and must fit snugly to work effectively, ensuring that it keeps the person afloat in the water. If the PFD is too loose, it may slip off in an emergency; if it’s too tight, it could restrict breathing and movement.

While other factors like color, style, and additional features such as pockets may contribute to personal comfort or preference, they do not affect the fundamental safety and functionality of the PFD in the same critical way that size and weight do. Prioritizing the correct size ensures the passenger's safety and increases the likelihood of the PFD performing as intended when needed.