The Luftwaffe kapok fill life vest had excellent floatation properties and could keep a pilot or crew member afloat up to 24 hours. The vest was almost exclusively used by bomber and transport crews because it was too bulky for use in single-seat fighters or dive-bombers. The high-collar helped to keep the wearer's head above water. One unfortunate design aspect of the vest was that the back was more bouyant than the front and had the tendency to roll the wearer face forward in the water.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.