The MTI Fluid Belt Pack Life Jacket - PFD is lightweight and comfortable belt carried PFD. Perfect for Paddle boarding, fishing or any other water sport where freedom of movement is important.The ultimate choice for SUP paddlers! So compact, you'll almost forget you're wearing it. Yet pull the cord and whoosh, the CO2 cartridge immediately activates and a life jacket bursts out of the pouch. Just put it on over your head, it is tethered to the belt pack around your waist so it won't float away.