T-shirt
The idea of the T-Shirt came to USA during WW1 when US soldiers noticed the light cotton undershirts European soldiers were using while the US soldiers sweated in their wool uniforms. Since they were so much more comfortable they quickly became popular among the Americans, and because of their design they got the name T-Shirt. During WW2 the T-Shirt had become standard issue underwear in both the US army and navy. After WW2 the T-shirt started appearing without a shirt covering it. John Wayne, Marlon Brando and James Dean all wore them on national TV. At first the public was shocked but by 1955 it had became acceptable. The T-Shirt became cool when James Dean wore it in Rebel Without A Cause.
In the 1960s people started to tie dye and screenprint the basic T-Shirt and variants such as the Tank Top, Muscle Shirt, Scoop Neck, V-Neck et.c. became popular.