I swiped a pair of 2undr at my local college gym. They were sitting, abandoned it seemed, on a hook to be washed with other clothes. The locker room attendant had apparently missed that set.
I took 'em home and tried em on. The really only work if I pull the waistband up high, which is off as I have relatively low hangers. I like em but they'll never be as good as a Bike jockstrap.