I bought a couple of King's Camo long sleeve T-shirts a few years ago, in the Desert Shadow pattern and made from 100% polyester. I've hardly worn them. They are stifling to wear, and don't seem to breathe or wick at all, even though the material has perforations all over it. As a result they are too hot when it is warm and you get chilled by sweat when the weather's cold. The camo pattern's okay I guess, but the material's shiny, which spoils the effect.

It is only a small sample, and they may have improved and have better products now, but I haven't been keen to give them another go.