The Fluid is designed to be the PFD you forget you're wearing. A belt pack PFD offering maximum mobility and freedom for Stand Up Paddlers. Pull the cord and the CO2 cartridge immediately activates, releasing a life jacket from 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. Fold lines on bladder for easy repacking. Includes whistle. Soft polyester shell is soft against the skin, with built-in window to confirm its readiness. GREEN means GO - It's a PFD on demand!