Gul Saco Buoyancy Aid - Blue The Gul Saco Buoyancy Aid is designed for the ultimate watersport adventure, perfect fit for any whitewater activity. The aid rescue is equipped with PFD features and PIVOT 360* core technology providing complete freedom of movement. Additonally the INFINITE+ and the failsafe shoulder straps use a self-locking pulley system. Furthermore the Napa is hydration-bladder compatible having multiple attachment option including a large front pocket with divider, internal rear pocket and double chest pockets for carabiners.