Under Armour UA Tech Polo Periwinkle Blue Performance Shirt Loose Fit Size XL No signs of wear at all. Appears new. The Under Armour UA Tech Polo in Periwinkle Blue is a performance shirt designed for travel and casual occasions. Made of lightweight and breathable polyester fabric, this loose fit shirt features a collared neckline, button closure, and short sleeves, making it perfect for spring and summer. The shirt is adorned with the Under Armour logo and comes in size XL with a regular size type. Machine washable and easy to care for, this polo shirt combines comfort and style for the active man.