I was so excited to find sheets to fit our split King Tempurpedic bed. When looking for sheets, I had only thought to search for Twin XL. The Twin XLs were always a low thread count and tended to pill  fairly quickly. So you can imagine my delight in discovering these nearly perfect Split King sheets that are a much higher thread count. They feel soft and smooth and are very comfortable. The only reason I gave them a 4 instead of a 5 is that they do wrinkle a bit. Not as bad as some I've gotten, but  I wish they came out of the dryer wrinkle free. Truth be known though, unless I find some that are completely wrinkle free, I'll be buying more of these.