These are the greatest underwear ive ever owned. Seriously, every single aspect of them are great. Extremely comfortable, in fact SO comfortable that they make regular cotton feel like sandpaper. 4 way stretch. The double pouch system has me wondering why underwear wasn't always like this. Even the fly is significantly improved, and I didn't even know there was a problem! I have always worn a medium but purchased size small, due to a very nice reviewer who pointed out the size discrepancy. So definitely order one size smaller than you normally wear. At least for me, doing so was a good decision. Everything about upgrading to this underwear was a good decision! I am so glad I didn't drop $30/ pair for designer modal underwear with only one crappy wiener pouch!