These sheets are egyptian cotton which is what I was looking for . However as others have noted, they do wrinkle a lot, which does not bother me, after all they are cotton and quite soft, definitely not "crisp". They fit my mattress just fine, but it is an older mattress and not several feet thick :)) The top sheet could be a little more ample in width, it is just barely wide enough. Since I was looking for an inexpensive set of good cotton sheets, these are exactly that. For the price I have not seen better. If you are budget minded, these will do.