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A Fly is an opening on the crotch area of trousers, closed by a zip or buttons. On men's garments the fly always opens to the right. On women's garments it may open either to the left or to the right.
Trousers have varied historically in whether or not they have flies. Originally, trousers did not have flies or other openings, being pulled down for sanitary functions. The use of a
A Fly is an opening on the crotch area of trousers, closed by a zip or buttons. On men's garments the fly always opens to the right. On women's garments it may open either to the left or to the right.
Trousers have varied historically in whether or not they have flies. Originally, trousers did not have flies or other openings, being pulled down for sanitary functions. The use of a codpiece
A codpiece () is a triangular piece that attached to the front of men's hose, covering the fly. It may be held in place by ties or buttons. It was an important fashion item of European clothing during the 15th–16th centuries. In the modern er ...
, a separate covering attached to the trousers, became popular in 16th-century Europe, eventually evolving into an attached fall-front (or broad fall). The fly-front (split fall) emerged later.Croonborg, Frederick: ''The Blue Book of Men's Tailoring''. Croonborg Sartorial Co. New York and Chicago, 1907. p. 123
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