Buying sheets is always a quandry to me. Which ones won't wrinkle at the top fold and roll up on the sides? I currently have Wamsutta 600 and 800 thread count sheets, and end up ironing the tops and the sides so they look better. (We have an Airbnb and I do this for guests.) I purchased 2 sets of these. I washed these as soon as I got them, and the top fold did not wrinkle up on either pair! Yay!! The sides did roll up however. They are thick and soft. I'm pleased with this purchase. Just FYI, the birch ivory color is a dull grayish blonde color. I wish it was a bit brighter. They would look cleaner.