Works fine. Fits the mattress with minimal slack even with an adjustable base frame. It does trap heat but that’s a trade off given the material and fabric density.
We bought a ghost bed and wanted to use a mattress protector. I’m glad we bought the Ghost protector. The design looks like the mattress top. The protector goes on like a fitted sheet so it will be easy to remove and wash. Sleeping on it I found it does not interfere with the cooling effects. Very nice protector.