I wanted to use these sheets on a converted twin bed to king bed. I visit family a couple of times a year and all they have are twin beds (Tough to sleep with wife and sometims a kid on a twin). I sent them directly to my family, when I arrived and opened the package the sheets felt stiff and cardboard like, and since I never had 1000 TC I would have thought they would be softer. I did not have time to wash them so I put them on the bed. They fit well and were deep enough to fit around the box spring, and they felt fine, I di not notice the stifnessm but ind out if the sheets softend up on my next visit.