Last year I bought the enduraskin shirt and tested it on a very hot,late summer day of putting up tree stands.I compared the labels with U.A. and they were exactly the same material. I was a little skeptical because I also believe that you get what you pay for. I have to say that it worked better than expected. I drenched it all day and stayed pretty cool. The sweat that it soaks up dries super fast as well. I do have a pair of U.A. underwear with the same material that I had previously bought. They work just as good as the enduraskin. I really didn't notice a difference between the two.