History of the T-Shirt | From Undershirt to Icon

The T-shirt began as a U.S. Navy undershirt in 1913 before becoming a global casualwear staple after World War II.

The T-shirt’s path from hidden underwear to cultural canvas is a distinctly American story. What started as a practical fix for overheated laborers in the late 19th century became standard military issue, then rebellious youth fashion, and finally the world’s most expressive garment. Understanding the history of the T-shirt means tracing how a simple cotton crewneck absorbed the values of every era it passed through.

What Came Before the Modern T-Shirt

The garment’s earliest precursor was the one-piece union suit, a full-body undergarment popular in the late 1800s. Workers and laborers found the one-piece design impractical in heat, so they adapted it by cutting the suit into separate top and bottom pieces. That separated top, with its buttoned collar and short sleeves, is the direct ancestor of today’s T-shirt.

This matters because it corrects a common misconception: the T-shirt was never designed as fashion. It was a utility garment born from necessity and workplace discomfort, not a designer’s sketch.

The U.S. Navy and the Birth of the Standard Tee

The U.S. Navy issued the first official T-shirt as an undershirt in 1913, standardizing a lightweight, short-sleeved cotton top for sailors. The design was simple and functional: a crew neck, short sleeves, and no buttons. It sat underneath the uniform, invisible but essential.

The word “T-shirt” entered American English in the 1920s, named for its T-shaped silhouette. For the next two decades, the garment remained firmly in the underwear category. That changed when millions of veterans returned from World War II and kept wearing their military-issue tees as casual outerwear. The undershirt crossed a line no one had drawn before, becoming acceptable street clothing.

Hollywood, Rebellion, and the Graphic Tee

Hollywood accelerated the shift. In the 1950s, Marlon Brando in A Streetcar Named Desire and James Dean in Rebel Without a Cause wore plain white T-shirts on screen, and the garment became shorthand for youthful defiance and working-class cool. A practical undergarment had become a statement.

The 1960s turned the T-shirt into a canvas. Screen-printed and slogan tees spread rapidly, letting wearers broadcast their identity, politics, and humor without saying a word. The garment went fully unisex during the 1960s and 1970s, cementing its place as a universal wardrobe staple.

The T-shirt’s history is often told with a tempting shortcut — a single “inventor” or a precise birth year — but the real story is slower and more organic. It evolved through workplace adaptation, military standardization, postwar habit, and Hollywood styling, with each phase building on the last.

Today’s T-shirt carries all of that history in a single seam. When you choose a shirt that reflects your values or your country, you are participating in a tradition that goes back more than a century. For a modern take on that tradition, our roundup of the best America-first shirts covers the top patriotic designs available right now.

Encyclopedia entries and fashion historians agree the T-shirt became broadly unisex by the 1960s and 1970s, and Wikipedia’s extensive T-shirt history traces that shift in detail, including how the garment moved from military undershirt to protest canvas within a single generation.