It’s hard to imagine life without the t-shirt. Yet, “t-shirt” didn’t become a word in the English dictionary until the 1920’s and the style didn’t enter mainstream fashion until the 1960’s. During W.W.I, American troops wore wool uniforms during hot summer days in Europe and noticed European soldiers wearing lightweight cotton undershirts. This cool apparel caught on fast with the Americans and by W.W.II, both the Army and the Navy included them in their uniforms. Up until the 1950’s, t-shirts were still considered underwear, until John Wayne, Marlon Brando, and James Dean shocked Americans by wearing their “underwear” on T.V. In 1955, James Dean helped make the T-shirt a standard item of clothing in Rebel Without a Cause.