Review on 🌬️ Marchpower Cooling Pillowcases - Japanese Arc-Chill Q-Max > 0.4 Cool Fiber Pillow Cases for Hot Sleepers, Anti-Static Breathable Cooling Pillow Cover with Hidden Zipper - Queen Size, 20"X 30" in Gray by Stephanie Klein

This cover has cooling material but only on one side and if you don't turn the pillows over all night you will find that same cooling side becomes a furnace, the warmth reverberates on your skull all night long. The other side of this bag is cheap t-shirt-like material and doesn't radiate cold or heat, so I like this side better. I've found that on the cooling side it gets chilly quickly as you stand up or move away from the pillow, but of course it doesn't stay that way. Better buy a very expensive percale pillowcase with lots of threads that stay cool longer.