I'll start off by saying, I LOVE THESE SHEETS!! I don't know what's been going on with the description (as it currently states polyester), but what I received is the following: 100% Egyptian Cotton - 400 Thread Count, 4 pcs (1fitted sheet, 1 top sheet, 2 pillowcases), All Pieces Satin-striped.
Im also really happy with the quality, after multiple washes. They aren't as soft as my 1000 TC sheets, obviously, but they are very soft. Less than $**, you can't go wrong...as long as you aren't looking for flannel. lol