Orioles Short Sleeve T-Shirt. This Majestic Men's 100% Polyester Coolbase shirt is made with the newest performance technology. The Orioles screenprint logo is featured front and center. The shirt is machine washable and tagless. This short sleeve crew neck is made with a moisture wicking cool base material. Perfect for the gym or for those hot Baltimore games! Go Orioles!! Officially licensed Baltimore Orioles fan gear.