They were well made and the fit was perfect (not too tight, not too loose). In addition, wicking properties of polyester are superior to many other materials. I personally dont care for the way polyester feels against my skin, which is why I exchanged it for a cotton top called the "ls thermal chunk". I was very pleased with the fit and feel of the new shirt. It soaks up my sweat like a sponge but the rest of my gear is breathable and wicks so it evaporates fast enough.