I must say that I was happy that I got the Medium shorts as they fit perfect for me, nice and tightly around my thighs, and with this special cut, which made a comfortable pouch around my family jewels. They would be perfect to wear for a run, but right now, in September 2011 when I was having a two week vacation in Switzerland, I just made do with wearing it as sleepwear. Wearing in my sleep the same shorts as my friend Chris had been wearing would ensure that I got a good night sleep.