The NEW Under Armour ColdGear Compression Shirt in Men's size Medium is a solid gray shirt made from a blend of polyester and spandex. It features a crew neck, long sleeves, and a pullover closure, making it perfect for activewear. The shirt is designed for athletic fit and offers mild compression, along with stretch and breathability for added comfort during gym and training sessions. The Under Armour brand ensures quality and performance in this basic style t-shirt.