This is a shirt from Muji Labo. It's very simple and easy to match with other clothes. It also goes well with denim. Although it's simple, the details, such as the buttons, are very well-made. The inside is made of flannel, so it's not see-through even when worn as a single layer. In winter, it's warm enough to wear on its own. I've only worn it a few times since I bought it, so I hope someone who likes it will wear it.