I've always had beefy legs. They've become even more so with my recent hobby of picking up enormous boulders and logs. That makes running, or even walking long distances problematic. My thighs ... they chafe. It hurts. My brother in law the policeman to the rescue. He told me to get a pair of these underoos, and my running has gone from pathetic, to spectacular in no time! I have this product to thank for my future cardiovascular health. 5 stars

I use Under Armour heat gear daily in my duties as a USAF Security Policman. This stuff makes a huge difference under my flak vest and/or my second-chance vest. I recommend this stuff to anybody that has to wear a tactical uniform. 5 stars

Great fit. They last a long time. I used these when I was deployed to the middle east, they held up very well and kept me cool. 5 stars

I am a size 31 waist and I ordered the medium shorts and they rock! I practice Krav Maga, boxing, and jiu-jitsu and I wanted something to help keep my nuts and bolts in place if I decided not to wear a cup that day. These shorts did the job perfectly, they keep me nice and snug even when rolling around, doing pushups, jumping jackets, running, etc...

I will be ordering a few more pairs. 5 stars

if your going for more of just an under layer and not a layer of protection from sliding, id go with teh performance breifs. 4 stars