Fly (clothing)

Common card · No. 379039

A fly (short for fly-front) is a strip of material covering an opening on clothing, often closed by a zipper or buttons. It is commonly found on the crotch area of trousers and the front of coats. It may also appear on certain men's undergarments such as boxers or briefs to allow for easier urination, known as a keyhole fly; in this case there is no closure on the opening, only overlapping fabric. On men's garments, the fly always opens on the wearer's right side; on women's garments, it may open either on the left or on the right.

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