I found this long-sleeve cool dry shirt to be well made and very comfortable.  The material is very comfortable and light weight, and it breathes -- so can be used as a light undershirt during the winter or a around-the-house shirt in spring and summer.  I'm 175 lbs. and found the "M" perfect for a "slim fit" and the "L" right for a looser, relaxed-look fit.  Overall a fine product at a good price.