I'll admit I was very hesitant about these panties because they were part polyester. I used to be a loyal customer of the Hanes Bikini underwear until the quality of those went down the drain. Then, I tried the so-called "Best Fitting Panty" which fit awkwardly after washing. I can't stand underwear with an exposed waistband, so finally I found these... My normal Hanes size was 5, so I went with a size 5 in these too and they fit PERFECTLY. They are super comfortable and the fact that it has some polyester in them has not made a difference at all. My only issue is that you can't choose your color with this 4-pack, but honestly with how comfortable they are that's just a detail. I'm going to be buying lots more of these!