I've come across these thongs by chance but didn't hesitate to order a few sets because it's not very easy to find a set of just black, plain, stretchy cotton thongs. And I absolutely loved them!! They are very soft; and made of 95% cotton, which means they are breathable and kind to the delicate skin. 5% of elastane adds stretchiness, making these everyday essentials very comfortable. In addition, I always go one size up in my underwear, but it's my personal preference.