These men's casual shirts are perfect for daily wear. To put them on, simply slip them over your head and button up. When choosing a size, remember to check the size chart carefully as each item may have different measurements. If it's an Asian size, it's better to go a size up. For maintenance, you can machine - wash these shirts in cold water with like colors. Avoid using bleach as it may damage the fabric. Hang them to dry to keep their shape. These shirts are made of polyester and spandex blend, so they're stretchy and comfortable. You can pair them with jeans for a relaxed look or dress pants for a more formal occasion.