Well this t-shirt is amazingly comfortable! No tag on the inside collar, but there is a tag along the lower abdominal seam which I promptly removed. It wicks away moisture quickly and stays dry far longer than any other shirts that I have. It is 100% polyester but not like the old 70's poly. I have worn it numerous times under body armor and it keeps me dry, I just wish it was made in the U.S.A. instead of China. It has "pilled" a tiny bit during my wash cycles, but it isn't very noticeable.