A swim cap, swimming cap or bathing cap, is a silicone

Silicone

Silicones are inert, synthetic compounds with a variety of forms and uses. Typically heat-resistant and rubber-like, they are used in sealants, adhesives, lubricants, medical applications , cookware, and insulation....

, latex

Latex

Latex is the stable dispersion of polymer microparticles in an aqueous medium. Latexes may be natural or synthetic.Latex as found in nature is a milky fluid found in 10% of all flowering plants . It is a complex emulsion consisting of proteins, alkaloids, starches, sugars, oils, tannins, resins,...

 or lycra cap worn on the head by recreational and competitive swimmers

Competitive swimwear

Competitive swimwear generally refers to the Swimsuit, apparel, equipment and accessories used in the aquatic sports of swimming, diving, synchronized swimming, triathlon and water polo.- Brands :Female Swimsuits*Racerback*Kneeskin*Bodyskin*LZR Racer...

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Caps are worn for various reasons. Some facilities require the wearing of swim caps, in order to protect filters

Filter (water)

A water filter removes impurities from water by means of a fine physical barrier, a chemical process or a biological process. Filters cleanse water to various extents for irrigation, drinking water, aquariums, and swimming pools.-Methods of filtration:...

 from becoming clogged with loose hair

Hair

Hair is a filamentous biomaterial, that grows from follicles found in the dermis. Found exclusively in mammals, hair is one of the defining characteristics of the mammalian class....

s which fall from the scalp of swimmers who are not wearing a cap. Caps are also sometimes worn in an attempt to keep the hair relatively dry or free from chlorinated water, to keep the sun off of the hair, and also, when a cap is worn with ear plugs, in order to keep water out of the ears.

Competitive swim caps are made of tightly fitted silicone, latex, or lycra that hugs the skull of its user, providing cover for his or her hair. This reduces drag in the water caused by loose hair. During longer swimming sessions, a swim cap keeps the head warm.

History

Swim caps were made of rubberized fabric during the early 20th century. By the 1920s they were made of latex. The earliest chin strap caps were known as "aviator's style" as they resembled the strapped leather helmets of flyers of the day. During the 1940s swim caps became scarce as rubber was needed for war materials. It was a lucky girl who had a swim cap to protect her "wave" (hair style) during that period. The permanent wave

Permanent wave

A permanent wave, commonly called a perm, involves the use of chemicals to break and reform the bonds of the hair. The hair is washed and wrapped on a perm rod and waving lotion is applied with a base. This solution creates a chemical reaction that softens the inner structure of the hair by...

 hairstyle took time to obtain and was expensive, so many women wanted to protect their hair while swimming. The 1950s saw decorated caps come into vogue, and during the 1960s colorful flower petal swim caps became popular. Men's long hair styles of the late 1960s and early 70's made swimming pool operators change rules requiring swim caps for swimmers with long hair. Without swim cap requirements wearing swim caps fell out of fashion during the early 1970s. Competitive swimming in the 1980s and 1990s and the worldwide construction of indoor lap swimming pools for fitness swimming, made the swim cap popular again. Today swim caps are available in competitive racing styles, traditional chin strap type with inner sealing to keep out water and colorful floral styles reminiscent of the 1960s as well as other graphic prints.

Wearing Double Swim Caps to Protect Hair

Many swimmers have trouble finding a swim cap that keeps their hair dry. Wearing two swim caps "double capping" can provide a tighter swim cap seal. A inner silicon or latex swim cap pulled low over the ears followed by a second traditional style outer swim cap may provide the protection desired. "Double capping" is also used by participants of open water swimming

Open water swimming

Open water swimming takes place in outdoor bodies of water such as open oceans, bays, lakes, rivers, canals, and reservoirs.The beginning of the modern age of open water swimming is sometimes taken to be May 3, 1810, when Lord Byron swam several miles to cross the Hellespont from Europe to Asia.In...

 to provide warmth.

English Channel swimming rules for swim caps

The English "Channel Swimming and Piloting Federation" and the "Channel Swimming Association" state that "one standard swim cap" may be used for official English Channel

English Channel

The English Channel , often referred to simply as the Channel, is an arm of the Atlantic Ocean that separates southern England from northern France, and joins the North Sea to the Atlantic. It is about long and varies in width from at its widest to in the Strait of Dover...

 record swims. The cap must be approved by the official observer who accompanies the swimmer on the pilot boat across the channel. "Standard swim caps" that have been used by English Channel swimmers of record over the years include solid rubber "tank" style swim caps, molded rubber swim caps with chin strap, bubble crepe rubber swim caps with chin strap, silicone swim caps and latex "racing" swim caps. Swim caps that have neoprene

Neoprene

Neoprene or polychloroprene is a family of synthetic rubbers that are produced by polymerization of chloroprene. Neoprene in general has good chemical stability, and maintains flexibility over a wide temperature range...

within the cap construction such as the "Barracuda Hothead" or are completely made of neoprene are not allowed for record English Channel swims. Several other long distance swims such as the Santa Catalina Channel California swim have similar rules for record swims. Swim caps worn for open water swims should be of visible colors in contrast to the water so that observers may safely monitor them, and operators of vessels may see them.
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