I wanted to love but do not. I bought because they are supposed to be for high intense, cardio activities. I wore them for the first time yesterday at a gym and did a workout in them. Of course I got sweaty but the worst part was that it showed all the sweat, so I started to get the dreaded V line o...n my front where my underwear (v-string) was. This was only 15 minutes in to my workout. Then it just got worse and spread and then showed on my back side with that nice little line where the thong was. At the end of the workout, even splotches of sweat showed on my knees and elsewhere. Thank god no one else was in the gym at that time. I had two sweatshirts with me and wore one out and tied the other around my waist because I was so embarrassed I didn't want anyone to see as I walked to my car. I am giving one star because they did stay up, but only after I tied the string really tight. I might try them in black and hopefully sweat won't show as I did like the feel. I disagree that they aren't too thin. They are thin enough you can see exactly what kind of underwear you are wearing, if it is lace you can see that, if it isn't you'll still see the lines. I don't like that either. Perhaps they didn't test the breathability on this fabric. Very disappointed. I will be returning once I get them washed!