The Under Armour Men's Headgear Loose Button Up Shirt in size Large is a solid blue shirt with a collared neckline and short sleeves. Made from polyester, this machine washable shirt is perfect for casual occasions during the summer, fall, and spring seasons. Featuring a button-down closure and pockets, this button-up shirt from the Under Armour HeatGear line is a comfortable and stylish addition to any man's wardrobe.