The Men's Under Armour Navy Columbia Fireflies Performance Long Sleeve T-Shirt is the perfect way to show your support for the Columbia Fireflies. Made from a comfortable cotton and polyester blend, this shirt features screen print graphics that proudly display the Fireflies logo. Whether you're cheering on the team at the ballpark or just showing your support around town, this shirt is sure to turn heads. The Columbia Fireflies are a Minor League Baseball team based in Columbia, South Carolina. They are the Class A affiliate of the Kansas City Royals. The Fireflies play their home games at Segra Park.