An undershirt may be worn to protect the body from stiff or otherwise uncomfortable fabric. It also makes dress shirts lesstransparent, and absorbs sweat that would otherwise wet the shirt's fabric. It can be worn during winter months as an extra layer of warmth, and reduces wear on the upper layers of clothing.[1][2]
Factory mass-produced undershirts became common in the West in the early 20th century, with innovations turning theunion suit into two pieces, for upper and lower body.
Asleeveless undershirt, also known as an A-shirt, tank top, has large armholes, a large neck hole, and offers little protection for armpit sweat.
Acrew neck T-shirt has a high neckline, often requiring fully buttoned shirts to avoid being seen.
A V-neck T-shirt has a V-shaped neckline. This allows the wearer to unbutton the upper buttons of a collared shirt without the undershirt being seen.[3]
A long sleeved T-shirt has long sleeves, and may be designed with extra insulation for use in cool weather.
.jpg)
