> Why aren't bed pillows made of foam?

Why aren't bed pillows made of foam?

Posted at: 2014-09-26 
They do have them.

http://www.bedbathandbeyond.com/store/pr...

http://www.amazon.com/Simmons-Beautyrest...

http://www.jcpenney.com/bed-bath/pillows...

For as long as I've had them, pillows always go flat. Washing them never returns them to like new condition and the down pillows don't really support the head.

I'm sure that there are plenty opinions to go around, but has anybody heard of the reason a bed pillow isn't made of a block of foam or even chunks of foam sewn in a a bag?