A man's nightshirt

A man's pajamas

Nightwear – also calledsleepwear, ornightclothes – isclothing designed to be worn whilesleeping. The style of nightwear worn may vary with the seasons, with warmer styles being worn in colder conditions and vice versa. Some styles or materials are selected to be visually appealing orerotic in addition to their functional purposes.

Nightwear includes:

• Adult onesie - all-in-one footed sleepsuit worn by adults, similar to aninfant onesie or children'sblanket sleeper and usually made from cotton.
• Babydoll - a short, sometimessleeveless, loose-fitting nightgown or negligee forwomen, generally designed to resemble a young girl's nightgown.
• Blanket sleeper - a warm sleeping garment forinfants and youngchildren.
• Chemise - a delicate, loose-fitting, sleeveless, shirt-likelingerie garment for women, typically intended to feature a provocative appearance.
• Negligee - loose-fitting women's nightwear intended to have sensuous appeal, usually made of sheer or semi-translucent fabrics and trimmed withlace or other fine material and bows.
• Nightcap - warm clothcap worn with pajamas, a nightshirt or a nightgown.
• Nightgown - loose hanging nightwear for women, typically made fromcotton,silk,satin, ornylon.
• Nightshirt - loose fitting shirt reaching to below the knees.
• Pajamas - traditionally loose fitting, two-piece garments.
• Peignoir - long outer garment for women, usually sheer and made ofchiffon; frequently sold with a matching nightgown, negligee, orpanties.

Other types of garment commonly worn for sleeping—but not exclusively so— includegym shorts,t-shirts,tank tops,sweatpants, as well as underwearand/or socks (worn without outerwear). Sleeping in the nude is also common, especially in warmer climates.^[1]

According to a 2004 United States survey, 13% of men wear pajamas or nightgowns for sleeping, whereas 31% wear underwear and another 31% sleep nude. Among women, 55% wear pajamas or nightgowns, which were counted under the same option:^[2]

A survey by theBBCThe Clothes Show Magazine in 1996 revealed the following about sleepwear in the UK:^[3]

†Most common response in 'Other' from women wasoutdoor clothes, from menshorts.

On 22 December 2011, theU.S. Consumer Product Safety Commission (CPSC) issued a letter to manufacturers, distributors, importers and retailers reminding the apparel industry of the enforcement policy and their obligations associated with children's sleepwear and loungewear.^[4]

The commission's regulations define the termchildren's sleepwear to include any product of wearing apparel (in sizes 0–14), such as nightgowns, pajamas, or similar or related items, such as robes, intended to be worn primarily for sleeping or activities related to sleeping, except: (1) diapers and underwear; (2)infant garments, sized for a child nine months of age or younger; and (3)tight-fitting garments that meet specific maximum dimensions.

All children's sleepwear and loungewear sold in the US are required to comply with the Flammable Fabrics Act (FFA) using the standards for Flammability of Children's Sleepwear 16 C.F.R. Parts 1615 and 1616. Moreover, they have to comply with theConsumer Product Safety Improvement Act of 2008 (CPSIA) requirements including tracking labels, a certificate of compliance, meeting requirements for lead content and surface coatings, and meeting requirements for phthalates.

• Nightwear

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