I used these shorts to run, swim & bike a recent triathlon, but was worried they would come off during the swim..  perhaps I should have gone with small, or maybe they weren't intended to swim in.  

They were very comfortable during the run, adequate for the bike, and I'm still looking for some swim/bike/run shorts that will work better on the swim!

These shorts are made of sturdy, comfortable material, but the crotch is slightly baggy.  Maybe a smaller size would fix that problem but then the waist would start pinching too much.

I did my first triathlon and the shorts were great - very comfortable. Not sure i'll do another, but will certainly wear the shorts for biking.

These are unbelievably comfortable!  I use them for cycling and triathlon.  They don't ride up and feel great against your skin.  I really love the length --- not too short and not too long. Pockets on the outside of each leg are handy for energy gels. I highly recommend them.  I plan to purchase at least 2 more pairs.