• A
sleeveless undershirt, also known as an A-shirt, tank top, has large armholes, a large neck hole, and offers little protection for armpit sweat. • A
crew 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. • A long sleeved T-shirt has long sleeves, and may be designed with extra insulation for use in cool weather. • A
camisole is an undershirt for women. • A
string vest is an undergarment made of mesh fabric that traps pockets of still air to act as thermal insulation. ==References==