This men's long - sleeves shirt is perfect for casual business settings. To choose the right size, always check the size chart as different suppliers have their own sizing. If it's Asian size, go a size up. When you wear it, simply button it up and pair it with nice pants. For maintenance, it's recommended to follow the washing instructions on the label. Usually, you can machine - wash it in cold water with like colors. Hang it to dry to keep its shape. Avoid using harsh detergents to prevent damage to the fabric made of viscose, polyester, and spandex.