The shirt is made of 100% viscose. It's not that heavy viscose, under the looms every tiny bump, but a whole light, thin material, what my real name. liked a lot and which also feels great against the skin also.
Before wearing, I wash clothes in principle. I can only agree with the previous speaker of: after the first wash, the side seams are warped. That's a No !!
I have the shirt to get hold of super-super bargain price of less than five euros ... for more, or even the former original price I would have returned it. One can with this warped shirt not dare to the streets. I'll use it as a home-Shirt, or it could also serve as a sleeping-Shirt to more good for it not unfortunately.