Carter W.wrote a review of Under Armour Ultra Compression Short - Women's on March 2, 2009
I have two pairs of these shorts and would love to have a dozen more. Best compression shorts I've ever run in. The compression is snug and supportive but not constrictive. The fabric is slick and comfortable and I've never had a problem with chafing or riding up, even while training for and running trail ultra-marathons. (Exception: one spot in the back of the waistband will sometimes rub a little if I'm wearing a long pair of tights over top of the shorts.)
I use these shorts as a base layer or by themselves, depending on the weather.
The previous poster's comments on her shorts was kind of surprising to me, because the fabric on my shorts has held up to heavy use and frequent washing for well over a year with no noticeable deterioration. (I wash them on the gentle cycle in a lingerie back and let them air dry.)
The best thing I can say about these shorts is that I don't notice them while I'm running. Why? Because they don't rub, ride up, itch or annoy me in any way. I just don't have to think about them. And that's a beautiful thing.