Out of box, washed and ran a 10k with these.  kept the "guys" in place and no chaffing at all.  After the race all of the guys were complaining about rashes and uncomfortable items.  Mine were nice and secure.  The legs on these are pretty long, in the event you lost your pants these will leave you looking as you have on some biking or short spandex shorts.  I will defiantly buy these again!