A T-shirt (or T-shirt or T-shirt) is a shirt of neutral fabric, named after the T-shape of the body and sleeves. It is usually associated with a short sleeve (a collarless round neck line, called a round neck). T-shirts are usually made of lightweight, inexpensive fabric and are easy to clean.

Woven or plain knitted fabrics, usually made of cotton, have unique flexibility compared with shirts made of woven fabrics. Most modern versions of the body are made of continuously woven tubes and are located on circular looms, so there is no side seam on the torso. Production of T-shirts is highly automated and may include cutting fabrics with lasers or water knives.

T-shirts evolved from underwear used in the 19th century, while in the middle of the 20th century, they changed from underwear to general casual wear.

The V-neck T-shirt has a V-neck, which is different from the round neck of the more common round neck shirt (also known as U-neck). V-neck is introduced, so that when the shirt is worn outside, the collar of the shirt will not protrude, thus reducing or eliminating the visible cloth above the shirt with round neck.