I have been running for a long time, too long to remember when I started. Over the thousands and thousands of miles I have had an opportunity to run in hundreds of different shirts. One after one they all had various issues. My wife recently handed me a shirt and said “hey try this and let me know what you think”. I took it for a test drive shortly afterwards. When I first put on the shirt I noticed how lightweight it was. Next, I noticed the seams in the armpit area. Let me rephrase, I noticed the lack of the typical seams in the armpit area. This may seem like a simple design change but until you’ve run a dozen or so miles with underarm irritation, you will know how important this is. I started off for my cool morning run, I hope you sensed the sarcasm, immediately I noticed that the shirt felt as if it wasn’t there (fortunately for my neighbors it was). I live in the DC area and needless to say running in the summertime can get a little muggy with the intense humidity and this brings an added layer of fun to running here. After a few miles my face was overrun with sweat coming down my head. After wiping away the sweat, I noticed something odd. While my head was dripping with sweat from the oppressive heat and humidity, my core actually felt cool and dry. Normally I look down and notice the familiar water marks on my shirts, but in this case, there was none. I almost felt as if the shirt was made of cool, almost ice like fabric. I was amazed. It felt like there was a cool…