Inflatable survival vest

An inflatable survival vest, comprising:

• an inflatable bladder having an inflation inlet through which a gas is input to inflate the bladder, the bladder being configured in the shape of a vest, the bladder having a plurality of parallel seams that define tubular channels which causes the vest to have a wavy outwardly facing surface with crests and troughs and a wavy inwardly facing surface with crests and troughs;
• an inner air chamber positioned along the inwardly facing surface of the bladder, the inner air chamber having a porous air permeable non-compressible filler material;
• an outer air chamber positioned along the outwardly facing surface of the bladder;
• a shell with limited stretch-ability overlying the outer layer, thereby limiting outward expansion of the bladder such that the bladder is adapted to expand inwardly pressing the inner air chamber against a body of a person wearing the bladder;
• and
• a circulation inlet is provided into and an exhaust outlet is provided out of the inner air chamber and the outer air chamber with a breath input device connected to the circulation inlet, whereby breath of the person wearing the bladder is circulated through at least one of the inner air chamber or the outer air chamber.