Blouson

An Austrian Bundespolizei blouson.[1]
A modern nylon MA-1 flight jacket.

A blouson or blouse jacket is a jacket that is drawn tight at the waist, causing it to blouse out and hang over the waistband. Originating in military uniforms of the mid-20th century, versions continue to be used as part of military, paramilitary and law enforcement uniforms in many places. As a piece of civilian clothing, it is considered to be both sportswear and casual clothing.

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