Over the following decades, factory workers, farmers, and other laborers began wearing them alone during hot weather because they were practical and inexpensive. The garment slowly moved from private underlayer to everyday workwear.

Its cultural status changed dramatically in the 1950s. Famous Hollywood actors helped turn the plain white T-shirt into fashionable clothing. Marlon Brando in *A Streetcar Named Desire* and James Dean in *Rebel Without a Cause* made the simple shirt look stylish, confident, and slightly rebellious. Suddenly what had been underwear became outerwear associated with youth and cool. By the 1960s and beyond, T-shirts evolved further into tools for self-expression. Printed slogans, band logos, artwork, and personal messages turned them into walking statements.

Today T-shirts are worn by people of all ages across the world. They remain popular because they combine comfort, affordability, and endless style possibilities. Despite the long cultural journey—from naval undershirt to work clothes to Hollywood icon to global canvas for personal expression—their name still comes from the same simple T-shaped design that appears the moment the garment is laid flat. The next time you pull one on, the quiet logic of that name is right there in the outline.