These men's long - sleeve shirts are a great addition to your wardrobe. To wear them, simply button up the single - breasted closure. The turn - down collar gives a classic look. When it comes to size, always check the size chart carefully as different suppliers may have different sizing. If it's an Asian - sized shirt, go for a bigger size. For maintenance, these shirts made of polyester and spandex are relatively easy to take care of. You can machine - wash them in cold water with like colors. Hang them to dry to keep their shape. Iron on a low setting if needed. Enjoy wearing these casual yet stylish shirts in various business or casual occasions.