I didn't realize how awful my cheapo tri shorts were until I went for a ride/ run in these. Silky smooth and they hold everything comfortably in place. I know, these cost more than the random stuff on Amazon, but you need these for long training sessions and on race day. I'm 5'5", 135 lbs. with a athletic build and have some tummy going on (I like cookies) and the medium fits just right. Covers my tush when reaching for the lower bars on my bike, doesn't slide down under my belly. Can't wait to swim in them! Coeur always fits just right.