Hopefully I won't have to come back here and adjust my review BUT this IMMEDIATELY did what I hoped it would do. I received this shirt Saturday. Monday mid delivery there was freezing rain. I put this shirt on and it covered all my bases but my hands and mouth, which well, duh. The weather was in the upper 30s low 40s with hailing rain and I stayed warm enough outside and cool enough inside. I bought one in Medium and one in Small because I was unsure how they would fit and now that I'm working on my bike again I'll be losing weight. Medium is perfect for me and will still be wearable when I loose that size. I can also wear the small but it tugs a bit and isn't long enough with my current size. I'm 5'3 and weigh 170, 38D. I wear a size 14 in the women's chrome shorts currently for reference. I just hope this holds up to abuse (I plan to wash carefully) in the meantime this product is so far PERFECT.