Kevin Plank founded Under Armour in 1996 after growing frustrated with cotton t-shirts that would get soaked with sweat during football practices. He developed a moisture-wicking synthetic fabric and started selling his new performance shirts out of his car trunk. By the end of 1996, Under Armour generated $17,000 in sales and made its first team sale. The company has since grown significantly and become a leader in performance athletic apparel, known for its innovative fabrics that keep athletes dry and comfortable.