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A-shirt undershirt
Example of t-shirt undershirt, usually not worn as outwear

An undershirt is an article of underwear worn underneath a dress shirt intended to protect it from body sweat and odors. Alternatively, it may be worn to protect the body from stiff or otherwise uncomfortable fabric that a person may be required to wear (such as a mandatory work uniform). It can have short sleeves or be sleeveless. The term most commonly refers to upper-body wear worn by males. This article of clothing typically has a low, round neckline that can be worn for athletic purposes.

It also makes dress shirts less transparent. It can also be worn during winter months as an extra layer of warmth.[1]


Factory mass-produced undershirts became common in the West in the early 20th century, with innovations turning the union suit into two pieces, for upper and lower body.

Types of undershirts[edit]


  1. ^ Esquire: the handbook of style : a man's guide to looking good. New York, NY: Hearst Books. 2009-01-01. ISBN 9781588167460.