Quality is definitely synthetic. There if there is cotton, which I doubt, then its ratio to synthetics 1/10. In the store, this quality would not have taken exactly. In such and in a cool time is not particularly comfortable, but in the heat so, in general, you can die. In general, the T-shirt is excellent in style and quality of performance. The only thing I did not like besides the quality of the material is the print. It's like a pixel. Before that, I ordered the same body, there the print is perfect and brighter than this. Compared to that, this one looks like it's cheap. The size is excellent. I have a chest 86, a waist 65-66 (Dew 40-42) size s sat well, a little loose. The style itself is slightly fitted. In general, not bad, but the material and print confuse me. While I think to leave or not. Whom does not confuse synthetics, I definitely advise))