Put to the test!
My wife got this for me and I was quite skeptical about this shirt. Even after I received it I still didn't quite understand how it works. But, I put it to the test the first time wearing it to work when the temperature reached over 100 degrees. I was out and about in the heat and barely even noticed it was scorching outside. I usually do not tuck in my shirts because they trap in all the heat, and I run hot & usually sweaty. But with this shirt I can keep it tucked in and not get all hot & sweaty. Great purchase and looking to get some more and try their regular tshirts too!