This is the Fluid 2.0 Inflatable Belt Pack by MTI Adventurewear. This pack is compact and comfortable to wear. It allows for maximum maneuverability, while still providing the safety cushion of knowing you are wearing a PFD if it is needed. Whether you are kayaking, out on a boat or even on a paddle board, this is the one to have especially in hot climates.
Fluid 2.0 on Amazon: http://amzn.to/2brrPAl