PJ Mark Short Sleeve Thermal Shirt Men\u2019s XL Neon Green Y2K is a trendy, relaxed fit shirt made of a light polyester and cotton blend. The solid pattern, short sleeves, round neckline and pullover style make it suitable for everyday wear, travel, activewear, casual as well as for party/cocktail. You can wear it in winter, summer, fall and spring because it has thermal features. This vintage shirt is made in Korea.