A tempur pedic mattress pad has a few main purposes. Some of those could be to improve a person's quality of sleep and/or to reduce a persons Back pain.
I have a 4" pad not the entire mattress. (The full mattress has only about 4" of space-foam). It took me awhile to gte used to it, but I like it and think I sleep more soundly on it.
From the Tempur-Pedic FAQ: We recommend you do not use either electric blankets or heating pads with our mattresses. The TEMPUR® material responds to your body temperature, and the additional heat from electric blankets or heating pads causes the mattress to respond to that heat instead of conforming to your body. Longer periods of exposure to the heat from electric blankets or heating pads may damage the mattress. Once you lie down, the mattress will quickly respond to your body heat and feel warmer.
The only purpose of a mattress pad is to protect the mattress. Do as you please.
This mattress pad can be machine washed and dried.
Prices of a Tempurpedic mattress pad ranges from $79 for a mattress protector to $299 for a mattress topper for times when a Tempurpedic mattress is not convenient.
It is an impenetrablematterss pad.
The mattress pad is meant to be placed on top of the mattress and directly under the bottom sheet.
National sleep makes a stain resistant mattress pad.
The Sealy Crib Mattress pad is 100% waterproof.
It goes under the mattress pad
I have been dealing with beds for 10 years. A mattress pad should go over the pad and under the sheets if you want to preserve it.
The Sunbeam Electric Mattress Pad is great and cost around $39.