Review on 2-Pack Cooling Pillow Cases – Standard Size, Double Sided Cold & Moisture Wicking Covers with Hidden Zipper – Japanese Cold Tech Pillowcase Protectors for Hot Sleepers and Night Sweats by Lori Lawson

So this is interesting. I liked that they had lightning bolts. And the blue stripe was nice, although much darker than the photo, it looked blue-grey. I don't think they really "cool" but rather some sort of slippery fabric that is naturally "colder" at room temperature but then warms up from your body temperature like everything else. I ended up not being able to use them because I usually sleep with two specific pillows stacked on top of each other. They were so slippery that the pillows didn't stay stacked on top of each other and came apart easily when I lay on them, making sleeping on them too awkward. These are not satin but have a similar effect. I ended up just taking them off and putting them in a drawer. I think someone might use them one day, maybe one of the kids. I'm glad they weren't too expensive.