I wasn't sure about microfiber, having been a cotton or cotton blend fan all my life. But I needed a grey full sheet set for my son's room, and this was the best-looking, best-priced option of the few available on any site I checked. Wow, they're wonderful. They're unbelievably soft and wash like a dream. The color stays true. I'm in the process of ordering another set because I like them so much better than his other sheets.