The brightly coloured internal layer present in sure aviation jackets serves an important objective past mere aesthetics. This vibrant hue, usually a particular shade of worldwide orange, was chosen for its excessive visibility. A downed pilot, notably in difficult terrain or water, may reverse the jacket, exposing the conspicuous coloration, considerably rising the probabilities of being noticed by rescue personnel.
This sensible design characteristic grew to become an indicator of military-issued flight jackets, particularly through the mid-Twentieth century. The improved visibility provided by this contrasting internal layer offered a significant security measure for aviators working in hazardous circumstances. Its adoption displays a broader emphasis on pilot security and survival, underscoring the significance of readily identifiable indicators in emergency conditions. This characteristic continues to be valued in each army and civilian aviation contexts.