Great base layer. Fits true to size (5'6 145 lbs - bought smmed). It's not quite a crew neck, more like a modified v-neck, which is a nice touch. I really like it because it is very cool (cool as in - groovy) looking and I like the fit. To be honest, I'm not sure how cool (as in - temperature regulation) it is keeping me. The chainmail type base layers definitely do a better job of letting cool (as in - cool) air in. Still, I like it and would buy it again.