I chose these because they were advertised to be 100% cotton (I didn't like the feel of other brands that switched from 100% cotton and had a spandex-like feel/cling).  With these, only the black ones were 100% cotton and the grey ones were only 90% cotton.  However, even these did not have that spandex cling so they are still usable.  Slightly rough to the touch but this was not noticeable while wearing.  I would buy them again.