Apparently, the mfr thinks that men who wear 3x have no belly. I had to re-order 4x to get a decent fit on my 3x frame. Washed it before wearing, in cold water and low-warm dry, just to get the wrinkles out & soften. I ended up with a cotton rag! It was so badly wrinkled, it appears to be 100% cotton! There cannot possibly be a single thread of polyester in the entire shirt! If you love to iron, this is the shirt for you! You will be ironing everytime you wash!!! I hate ironing, so this shirt is the most  expensive rag in my rag pile.