I have only tried on the shirt so far, but it was not what I expected. The torso was very tight and it was difficult for me to take the shirt off. The arms were fairly loose compared to how the torso fit. I am 6'1", 160 lbs and I ordered a Medium. I expected the shirt to fit tight in order to layer underneath other clothes, but the cut is not proportional. If you are in between sizes like me, (I can wear mediums and larges) go for the larger size - even if you want it to fit tightly. A normal shirt would be looser through the torso and tighter around the shoulders and arms. Also, the fabric is pretty rough. I'm not sure that I could wear this as a base layer against my skin because it is so coarse. I am hoping that after a wash it will soften up and maybe fit better. If it shrinks at all, I don't think I'll be able to wear it.