It's summer here so nothing's cool (except my new shirt), but in the winter I find the bottom side of my pillow can get quite chilly. I use two pillows. Maybe that makes the difference.
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Pillow Talk
- Thread starter SilentPanda
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I use one pillow. Do both sides that are down under get cold or just the lowest one?
That's right. I made that Australia "down under" joke. I'll be here all week.
Pillows are insulators, in that they hold air in them. The heat from the air rises to the top of the pillow, leaving the bottom of the pillow noticeabley cooler. This is similar to (but not exactly like) what happens with moisture-wicking fabric technology; except instead of wicking moisture from the body, the pillow is naturally wicking hot air from the bottom of the pillow.
I just felt the underside of my pillow, feels around the same as the top.
During the night, I have to turn it over often. Sometimes, I turn the entire duvet over. Bliss.
I've always thought someone should invent a pillow that circulates perfect temperature air through it.
During the night, I have to turn it over often. Sometimes, I turn the entire duvet over. Bliss.
I've always thought someone should invent a pillow that circulates perfect temperature air through it.
I think someone's sleeping in your bed during the day
Edit: just checked mine and the underside felt warmer. God I'm bored!
Another mystery of the unexplained: can you cry underwater?
It depends on how deep you go - the hydrostatic pressure would tend to keep your tears in at greater depths.
I use one pillow. Do both sides that are down under get cold or just the lowest one?
That's right. I made that Australia "down under" joke. I'll be here all week.
Both of them get cold.
*Waits for SilentPanda's next thrilling joke*
Can't say exactly why the bottom part seems cooler when you just get in bed; actually, it doesn't work that way always in my experience.
What I can say is why the bottom part is never warmer; being in permanent contact with another surface will not affect its temperature at all if the other surface isn't generating heat and is at the same temperature.
As a matter of fact, a sweater for example doesn't warm anything up; if you put your sweater to your chair, you can come back 10 hours later and find the chair as cold (again - provided it's a controlled environment with a stable room temperature and no object generating heat) than it was when u put the sweater around it. Cloth - and blankets for that matter - don't "warm" things up, just prevent heat from dissipating as quickly. Thus, two surfaces touching at the same temperature won't get warmer together.
A little off topic, but I always like to pinpoint this when I get into ANY thermodynamics conversation (I have no idea why, maybe I'm just crazy!): cold doesn't exist in reality, it's just lack of heat.
What I can say is why the bottom part is never warmer; being in permanent contact with another surface will not affect its temperature at all if the other surface isn't generating heat and is at the same temperature.
As a matter of fact, a sweater for example doesn't warm anything up; if you put your sweater to your chair, you can come back 10 hours later and find the chair as cold (again - provided it's a controlled environment with a stable room temperature and no object generating heat) than it was when u put the sweater around it. Cloth - and blankets for that matter - don't "warm" things up, just prevent heat from dissipating as quickly. Thus, two surfaces touching at the same temperature won't get warmer together.
A little off topic, but I always like to pinpoint this when I get into ANY thermodynamics conversation (I have no idea why, maybe I'm just crazy!): cold doesn't exist in reality, it's just lack of heat.
Until I saw this thread, I never even noticed the temperature of my pillow. Now I know you can have warm and cool pillows.... Cool, I learned something new on MR today.
Cool, I learned something new on MR today.
Now you'll have to sleep on it.Until I saw this thread, I never even noticed the temperature of my pillow. Now I know you can have warm and cool pillows....