The quality of the satin sheets (all poly) are much better than many. They are yummy to sleep on and look so extravagant on the bed with a new black comforter I found to go with these. My bed is very inviting. The con is if you use only satin pillow cases the set is too slippery and sleeping is tricky. I found that if I use a cotton case on the top pillow I lay on each side of the bed and have the satin case on the other 2 pillows on each side I don't seem to have the same problem. Funny, but true I sleep so much better doing that. The comforter does slip down a bit but not all the way off the bed. The other issue seem to be that the side I sit up on often pulls the sheet away from the other side where it is tucked in and gets all loose on the side I sit while I do things on a table I use, like a computer or other things. So I have to re tuck the opposite side of the bed each day if I want the sheet to look tight which is much nicer looking. It is a bit of extra work to have satin sheets, but for the beauty and the feel I guess it's worth it to me. I live alone and can do what I want. I love a bed to be beautiful and I also love to feel papered in bed; so I treated my self. If you by this kind of sheet set try the cotton pillow case trick and just see the difference. But be ready to straighten it often more than cotton sheets. Thanks again.