Buoyancy aids are a specialist form of
Personal Flotation Device (
PFD) used most commonly by
Kayakers and
Canoeists. They are designed as a flotation aid, rather than a life-saving device and have several key differences to other PFD's and life-jackets.Canoeing and Kayaking buoyancy aids are designed with mobility in mind. A buoyancy aid that doesn't fit properly can restrict a paddler's (kayaker's) range of movement, which could cause them to tire or prevent them from paddling properly. They typically have front and back foam buoyancy, with none or very little around the sides to allow for better arm movements.
See more at Wikipedia.org...