This slim - fit men's shirt in pastel colors with hidden buttons is a great addition to your wardrobe. To wear it, simply button it up through the hidden buttons and adjust the collar. For the best fit, always check the size chart as sizes can vary by supplier. When it comes to maintenance, this shirt made of polyester and spandex can be machine - washed on a gentle cycle. Avoid using harsh detergents that might damage the fabric. After washing, hang it to dry to keep its shape. And don't forget, if you're used to US sizes, you might need to adjust when choosing an Asian size as described in the product details.