I have been looking for a long sleeve T-Shirt as undershirt for a while and bought a few as well. But none of them were as solid and nicely fit as this one. I am a picky person, and look for specific item,, I found this one and love it. The only thing is, the sleeves are bit too long (but I am Asian, sleeves tend to run long on clothing I bought.). I will buy this one again. I am 5"5, weight 123LB, and medium build, this small size fit perfectly!