Hey, in the past I've used 100% cotton tees for uniforms, light in color with embroidered logo. This winter I've been wearing polypro undershirts under the tees, and sweat seems to wick very well. I'm in a very hot/humid area and am not satisfied anymore with cotton. After the first lawn the shirt is completely soaked. Does anyone out there have any experience with more modern fabrics, like CoolMax, polypro, etc. I'm planning on getting a batch of new tees made, but would like to try some different fabric. Thanks.