Under Armour's first moisture-wicking shirt was called what?

Under Armour’s first moisture-wicking shirt was called “The Shorty.”

The Shorty was prototype #0037, the garment that launched Under Armour’s performance-apparel story in 1996. It was designed as a soft, stretchy, skin-tight shirt that moved perspiration away from the body more effectively than the cotton T-shirts athletes commonly wore under uniforms.

Founder Kevin Plank developed the idea after noticing that his compression shorts stayed drier than his sweat-soaked football shirts. He refined a synthetic-fabric prototype and shared early versions with former University of Maryland teammates and NFL players. Their feedback helped turn the experiment into a commercial product.

HeatGear is often confused with The Shorty because HeatGear became the name of Under Armour’s hot-weather fabric and apparel line. The Shorty was the original prototype or nickname; HeatGear was the later product technology and range built around the same moisture-management idea. “The Compression” and “The Tight” describe general garment styles, not the specific name of this pioneering shirt.