A polo shirt, also known as a golf shirt and tennis shirt, is a T-shaped shirt with a collar, a placket with typically two or three buttons, and an optional pocket. Polo shirts are usually made of knitted cloth (rather than woven cloth), usually piqué cotton or, less commonly, silk, merino wool, or synthetic fibers.
History of the tennis shirt 
In the 19th and early 20th centuries, tennis players ordinarily wore "tennis whites" consisting of long-sleeved white button-up shirts (worn with the sleeves rolled up), flannel trousers, and ties. This attire presented problems for ease of play and comfort.
René Lacoste, the French seven-time Grand Slam tennis champion, decided that the stiff tennis attire was too cumbersome and uncomfortable. He designed a white, short-sleeved, loosely-knit piqué cotton (he called the cotton weave jersey petit piqué) shirt with an unstarched, flat, protruding collar, a buttoned placket, and a longer shirt-tail in back than in front (known today as a "tennis tail"; see below), which he first wore at the 1926 U.S. Open championship. Beginning in 1927, Lacoste placed a crocodile emblem on the left breast of his shirts, as the American press had begun to refer to him as "The Crocodile", a nickname which he embraced.
- the short, cuffed sleeves solved the tendency of long sleeves to roll down
- the soft collar could be loosened easily by unbuttoning the placket
- the piqué collar could be worn upturned to block the sun from the neck
- the jersey knit piqué cotton breathed and was more durable.
- the "tennis tail" prevented the shirt from pulling out of the wearer's trousers or shorts
In 1933, after retiring from professional tennis, Lacoste teamed up with André Gillier, a friend who was a clothing merchandiser, to market that shirt in Europe and North America. Together, they formed the company Chemise Lacoste, and began selling their shirts, which included the small embroidered crocodile logo on the left breast.
Application to polo and other sports 
Before Lacoste’s 1933 mass-marketing of his tennis shirt, polo players wore thick long-sleeve shirts made of Oxford-cloth cotton. This shirt was the first to have a buttoned-down collar, which polo players invented in the late 19th century to keep their collars from flapping in the wind (Brooks Brothers's early president, John Brooks, noticed this while at a polo match in England and began producing such a shirt in 1896). Brooks Brothers still produces this style of button-down "polo shirt". Still, like early tennis clothing, those clothes presented a discomfort on the field, and when polo players became aware of Lacoste’s invention in the 1930s they readily adopted it for use in polo.
In 1920, Lewis Lacey, a Canadian born of English parents in Montreal, Quebec in 1887, haberdasher and polo player, began producing a shirt that was embroidered with the logo of a polo player, a design originated at the Hurlingham Polo Club near Buenos Aires. The term polo shirt, which previously had referred only to the long-sleeved buttoned-down shirts traditionally used in polo, soon became a universal moniker for the tennis shirt; no later than the 1950s, it was in common usage in the U.S. to describe the shirt most commonly thought of as part of formal tennis attire. Indeed, tennis players often would refer to their shirt as a "polo shirt," notwithstanding the fact that their sport had used it before polo did.
In 1972, Ralph Lauren included his "polo shirt" as a prominent part of his original line called Polo, thereby probably helping to further its already widespread popularity. While not specifically geared for use by polo players, Lauren’s shirt imitated what by that time had become the normal attire for polo players. As he desired to exude a certain "WASPishness" in his clothes, initially adopting the style of clothiers like Brooks Brothers, J. Press, and "Savile Row"–style English clothing, he prominently included this attire from the "sport of kings" in his line, replete with a logo reminiscent of Lacoste’s crocodile emblem, depicting a polo player and pony. This worked well as a marketing tool, for subsequently, due to the immense popularity of Lauren’s clothing, a majority of English-speaking westerners began to refer to Lacoste’s tennis shirt as a "polo shirt". Still, "tennis shirt" remains a viable term for all uses of Lacoste’s basic design.
Over the latter half of the 20th century, as standard clothing in golf became more casual, the tennis shirt became adopted nearly universally as standard golf attire. Many golf courses and country clubs even require players to wear polo shirts as a part of their dress code. Moreover, producing Lacoste’s "tennis shirt" in various golf cuts has resulted in specific designs of the tennis shirt for golf, resulting in the moniker "golf shirt". Golf shirts are commonly made out of polyester, cotton and polyester blends, or mercerized cotton. The placket typically holds three or four buttons, and consequently extends lower than the typical polo neckline. The collar is typically fabricated using a stitched double-layer of the same fabric used to make the shirt, in contrast to a polo shirt collar, which is usually one-ply ribbed knit cotton. Golf shirts often have a pocket on the left side, to hold a scorepad and pencil, and may not bear a logo there.
Other uses 
|This section does not cite any references or sources. (August 2012)|
Since 1933, the tennis shirt has become so popular that it has become one of the standard categories of clothing. Virtually every major clothier makes some version or variation of Lacoste's tennis shirt. It is today worn by both men and women in numerous non-athletic contexts.
Notably, tennis shirts are worn by many semi-professional and retail workers in settings where T-shirts are not acceptable, but formal business attire is not required. In contemporary Western fashion, tennis shirts are considered more casual than woven button-front shirts while still being slightly dressy.
It is also a favored shirt for those working outside, such as groundskeepers and maintenance workers, due to its ruggedness and style. During the 1990s, the tennis shirt became the standard informal business attire for the high-tech industry and then spread to other industries (see business casual). A form of tennis shirt (often prominently branded with the company name and logo) is a common element of a uniform for retail companies.
In many schools that require students to wear uniforms, especially junior schools, tennis shirts are part of a compulsory uniform for both boys and girls.
The tennis shirt continues to have wide use in athletics, including non-athletes associated with sports in their employment, such as caddies and sports announcers.
Over the years the polo shirt has become a favorite giveaway in many corporate events, and is a fashion style that can be worn with jeans, shorts and slacks.
See also 
- Fashion Encyclopedia, "Lacoste Sportswear" (2007).
- The Story of Lacoste. Retrieved from http://www.lacoste.com/library/pdf/LACOSTE_history_histoire.pdf.
- Style & Design: Lacoste. Time Magazine, Winter 2004. Retrieved from http://www.time.com/time/2004/style/111504/article/lacoste_on_a_lark_and_a08a.html.
- The Brand Channel, Lacoste profile.
- The Crocodile
- The Birth of the Crocodile
- Butterworth, Helen. "The History of the Polo Shirt". Retrieved 22 November 2012.
- Official Brooks Brothers history website
- Fashion Encyclopedia, "Brooks Brothers".
- Monday, Sept. 01, 1986 (1986-09-01). "A Popular Shirt Tale". TIME. Retrieved 2012-07-09.
- Official Ralph Lauren history website: "1972".
- Official Ralph Lauren history website: "1967".
- "Dress Code", BURLEIGH HEADS GOLF CLUB
- "Dress Code: Proper Golf Attire", Long Island National Golf Club
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