A T-shirt is a buttonless and collarless pullover shirt usually with short sleeves. The best ones are a 100% cotton knit fabric fabric knitted in a jersey stitch to give it it's distinctive soft texture. Sometimes a blend of cotton & polyester is used, giving longer-lasting color that is less prone to fading, but can sometimes pill.
T-shirts originally became popular in the U.S. when they were issued by the US Navy around the time of the Spanish American War. These were a crew-necked, short-sleeved, white cotton undershirt to be worn under a uniform. It became common for sailors and Marines in work parties, the early submarines, and tropical climates to remove their uniform "jacket", wearing (and soiling) only the undershirt.
It was named a T-shirt due to it's shape when laid flat. It soon became popular as a bottom layer for workers in various professions, including agriculture. Boy's shirts were made in various colors and patterns.
Following World War II, it became common to see vets wearing their uniform trousers with their T-shirts as casual clothing. They became popular for young men in 1951 after Marlon Brando wore one in "A Streetcar Named Desire". And then James Dean a white T-shirt in "Rebel Without a Cause" in 1955. And the white T-shirt had a resergence in popularity when Don Johnson wore one with an Armani suit in the 1980's hit TV show "Miami Vice".
Visit my addoway store for T-shirts with various themes.