I sweat when I work out. A lot. I mean, it's ridiculous. And my typical cotton workout clothes get very uncomfortable at the end of a run or heavy lifting session. I started shopping around for some new threads and initially looked at Under Armour. But the high price tag - for what I assumed was just a premium on the brand - didn't appeal. I found the Champion shorts at a local Target and ordered the matching shirt from amazon (there were no matching shirts in Target). The mesh is highly breathable and provides a comfortable feel even when I'm super-sweaty. It's extremely lightweight and a good length. My only issue is a slight plastic-y smell, presumably from the poly fiber, even when freshly washed. But I get used to it within just a few minutes.