Flipperjo, this last set I bought were 100% cotton sateen, 300 thread count. They're much softer than the old sheets that were on that spare bed. I think they came out so wrinkled because I had three sets of sheets in the dryer and the new ones may have gotten tangled up. When I rewashed the pillowcases and hung them outside to dry (which I'm not allowed to do because of our condo rules), they came out very nice. We've decided to keep them, because they ARE soft, and with the duvet over the sheets, who will notice the wrinkles anyway?
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When you don't like a thing, change it.
If you can't change it, change the way you think about it.

(Maya Angelou)