Slept with this last night after a few nights of just being too hot. Not sure if it was my imagination but definitely felt more comfortable so will buy more so I have spares when they're in the wash.
In the throes of hot flushes and these are great. Cool to the touch when you first make contact and then warm up, so you do need to turn or move to get a new cool spot but works for me. Was dubious about it being a man made fibre and stretchy but they look great and feel soft and silky.