For example, two billion T-shirts are sold per year in the United States, and the average person in Sweden buys nine T-shirts a year. T-shirts are inexpensive to produce and are often part of fast fashion, leading to outsized sales of T-shirts compared to other attire. The manufacture of T-shirts has become highly automated and may include cutting fabric with a laser or a water jet. Some modern versions have a body made from a continuously knitted tube, produced on a circular knitting machine, such that the torso has no side seams. They are typically made of cotton textile in a stockinette or jersey knit, which has a distinctively pliable texture compared to shirts made of woven cloth. It is an intercultural staple of casual wear, worn by people of all genders. The T-shirt evolved from undergarments used in the 19th century and, in the mid-20th century, transitioned from undergarments to general-use casual clothing. T-shirts are generally made of stretchy, light, and inexpensive fabric and are easy to clean. Traditionally, it has short sleeves and a round neckline, known as a crew neck, which lacks a collar. A woman wearing a pink V-neck T-shirtĪ T-shirt (also spelled tee shirt, or tee for short) is a style of fabric shirt named after the T shape of its body and sleeves. For other uses, see T-Shirt (disambiguation).