Not many of us can say that we have been in temperatures so cold that it froze our pillows. I can say that. Yes, you read it right; so cold it froze our pillows.
When we finally made it to Idaho where our youngest son was about to start college, we hurried into the warm motel. We had had two very long days of travel, and were anxious to get out of the cold and into the warmth.
We did not need our pillow, so they were left in the car along with a few other things. I made sure all our electronics made it inside, as I was not sure what would happen to them.
The next morning, my husband went out to turn the car on so that it could get warmed up before we headed to the college 30 minutes down the road. It had got down to 16 below the night before. He came in with our son's pillow...it was solid...it FROZE. We had a big laugh out of that one!
The only other things that froze were our water bottles. They stayed that way for quite a while.
Even setting them on the dashboard in the sun and on top of a winter hat did not do the trick. Eventually, our water melted, and we had some very cold water.
By the way, the pillows we have are those memory foam pillows. My pillow did not freeze, as I have a normal one; but the pillows my husband and son use did freeze, these are the memory foam type.