If you were designing a PFD what factors would you need to take into account?

When designing a Personal Flotation Device (PFD), key factors to consider include buoyancy, ensuring it provides sufficient floatation for various body types and weights. Comfort and fit are crucial, as the PFD should allow for ease of movement and not hinder the wearer’s activities. Additionally, durability and water resistance of materials are important for longevity and performance in various conditions. Finally, visibility and safety features, such as reflective strips and emergency whistles, should be incorporated to enhance safety.