I have to tell you, I was excited for fun Betsy Johnson sheets for my split king...until they pulled up literally every time I sat on my bed. After a bunch of research, I found that ghost bed has patented a special elastic to hold the sheets in place. They have not come off even once. Not even after some extra curricular activities!
I recently made a purchase of GhostBed sheets along with 2 other brands, so I could rotate my sheets weekly. The GhostBed sheets were the first of four different sheets that I purchased and arrived, and I slept on them the first week. I was amazed because I do sometimes wake up in the middle of the night hot. I was pleasantly surprised by the cooling effect of the GhostBed sheets. It was absolutely amazing how I felt. The second and third week were with other brand sheets, and one of the two that I slept on felt comfortable during the night, but still didn't meet the quality of the GhostBed sheets. I have to say that I can't wait to get back in the rotation of the GhostBed sheets which were hands down the best sheets I have ever slept on. I will be sending at least one of the other brands back and getting another GhostBed sheets. I'm so glad they make sheets for split king, I only wished they came in more colors, but at least they perform AAA+. Sheets are definitely a personal preference and I didn't want to get hung up on thread count and promises of this or that, but whatever GhostBed does with there sheets....keep doing it!!