I won these along with the matching fishnet liner in a raffle at Sea Otter Classic in 2011. I've used these in cyclocross & XC races, spin classes and even running events. The combo has held up pretty well, save for a few broken stitches in the fishnet. Oh, and the "female" side of the velcro has frayed a little. I'm not sure why that velcro is even there -- the elastic on the back does a fine job.
I liked the combo so much that I bought the matching long sleeve top to complete the kit.