There are three different types of buoyancy aids: recreational, sea kayaking and whitewater buoyancy aids. Recreational buoyancy aids are simple, safe and ideal for recreational and beginner kayakers. Sea kayaking buoyancy aids are more technical pieces of kayaking equipment. They have more pockets at the front and back, shaped foam and made from hard wearing material. Whitewater PFDs have extra flotation for safety in whitewater.