I thought I'd give these a try, as I love Underarmour underwear. Let me tell you this, these are just as good at 1/2 the price! They are the same type of material, and seem to function the same. I've worn them to the gym and they felt just like my underarmour during the workout. I've also worn them on days when I don't work out, and they are extremely comfortable. The only reason I didn't 5 star these is because I've only had them about a month. I have underarmour that's going on 5 years old and still wears like the day I bought it. I'll try and update in another month or so...