T-shirt ... Design .GU1

The T-shirt is a garment made of fabric, often in jersey or knit fabric, without buttons and without a collar, that covers the torso of the wearer. It can be designed with long or short sleeves, using natural fabrics such as cotton or synthetic fibers. T-shirts can be solid-colored or feature multi-color patterns.
Marlon Brando wears a short-sleeved T-shirt in the movie A Streetcar Named Desire.
Although similar clothing items with varying sleeve lengths can be found throughout ancient times (such as among the Etruscans) and during the Renaissance period, examples of garments resembling a T-shirt became widespread only from the 18th century as undergarments, and from the 19th century as workwear due to their comfort and the absence of a collar, which is a distinctive element of elegance.
Sailors in the 19th century wore a variation very close to the contemporary model, characterized by typical horizontal stripes.
World War II In the 1940s, the US military adopted the crew-neck T-shirt as part of the uniform for its soldiers. As a result, the use of T-shirts spread widely in Europe during World War II.
The 1950s and the influence of cinema The popularity of the T-shirt as a fashion garment, beyond its intimate or workwear use, solidified in the 1950s when American fashion spread worldwide through cinema. Famous actors like James Dean and Marlon Brando wore the iconic white short-sleeved T-shirt on the big screen, paired with a pair of jeans. From that moment on, the T-shirt became firmly established in contemporary fashion.