I admit that I had with my size 40/42 or M and a large bust size (80 F / G) fear that the compression shirt does not fit. But it does. Although it sits close to the body, but that's what it should. As the word compression says that shirt is for that very reason be closely so that this warming and sweat reliably derives, so that no one feels uncomfortable. I am now able to test well in my almost 11 km long run, that the shirt can keep loose what it promises; And I've still pulled my running jacket over it, because the shirt is still very tight and might look unfavorably while running. L would have been better for me eating one which does not disturb while running but absolutely. Is just a personal feeling. The shirt itself is sitting comfortable on the skin, is not as hard as cotton and cozy and warm the body and the muscles, so you can save energy and better implement and maintain.
I will now put on shirt each time you run, it has absolutely convinced me. It keeps definitely delivers what it promises and acts by compression property on a good performance increase of the body. TOP!