What are the primary components of personal flotation devices?

The primary components of personal flotation devices (PFDs) are indeed the buoyant material and a securing mechanism. The buoyant material is crucial as it provides the necessary flotation to keep the wearer afloat in the water, which is essential for safety when utilizing these devices. This material can vary, but it typically consists of foam or other lightweight, buoyant substances designed to support a person's weight and keep them above the surface.

Additionally, the securing mechanism is vital for ensuring that the PFD remains on the wearer in case of an emergency. This mechanism usually involves straps, buckles, or zippers that help secure the device snugly against the body, preventing it from slipping off in the water. The combination of these two components is what makes personal flotation devices reliable and effective for water safety.

The other options, while relevant to other types of equipment or safety gear, do not pertain to the essential functions of PFDs, which focus on buoyancy and securing the wearer.