The quality of these athletic capris is great (as are all of my UA athletic bottoms) and so far they've held up to many strenuous workouts.  My biggest issue with them is they tend to slide down during my workouts, requiring me to hike them back up over and over again - especially while running or jumping.  They only tend to stay up without assistance once I'm a bit sweaty, which I believes help them adhere to my body better.  That being said, they definitely keep me cool and dry and the fit is true to size (I'm 145lbs with a 31" waist and the medium fits great).