I'm once again amazed at the good quality that comes on the table or on my skin. The material is 100% polyester, but I still find it very comfortable to wear. The freedom of movement under the armpits is very good. I will use the shirt as a training shirt. Which is a good thing. Because although it is very breathable, it does not absorb sweat well under the arms. At least I don't know the company Peak Velocity or I don't know it. Even after the first wash, the seams are still there where they loosen. Full marks for me too.