I have ordered lots of these since I first read an article recommending them, while searching for reviews of affordable cotton underwear. I'm not a fan of the microfiber (polyester) trend. These are 95% cotton, 5% spandex. The quality is very good, and with these sets of 6 or10, you can sometimes pay under 2 bucks a pair, which is a great deal. I love the color assortment available - a mix of standard colors and fun prints (pineapples, for instance). They hold up well in the washing machine - I've had some pairs for over a year and are my daily go-to, and they are like new. I don't put underwear in the dryer, I hang dry them (in the sun usually), and they dry quickly. Over time I plan to replace all my underwear with these, as the others wear out (goodbye Target, AEO, Hanes, etc). The only ones I like better are my old VS cotton undies, that have held up 10 years or more - but the new ones they have are lower quality so I'm done with them too. I hope Amazon keeps offering these at a low price. Sizing - I have a 27-in waist, 36-in hips, which according to the chart means XS. No way! I got all mediums, which is my usual panty size, and they fit well - snug enough to stay up but not pinching or digging in. I recommend getting your usual panty size and ignoring the chart. These stay put, don't ride up, feel soft, have good elastic on the legs/waist, and generally are so comfortable that I forget I'm wearing them. No wedgies, thank goodness. Buy these.