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.
It goes under the mattress pad
The mattress pad is meant to be placed on top of the mattress and directly under the bottom sheet.
The Sunbeam Electric Mattress Pad is great and cost around $39.
This mattress pad can be machine washed and dried.
Seriously. Just dump it.
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 Sealy Crib Mattress pad is 100% waterproof.
National sleep makes a stain resistant mattress pad.
If you put it over the memory foam, it get hot whiels you sleep so i say put it under
A bed or mattress pad is designed to lie atop an existing mattress. It is made primarily by foam and its function is to provide a layer of comfort and warmth between the user and the mattress.
You can buy an electric mattress pad from the big box store Walmart. They have many stores around the country. You could also buy an electric mattress pad from the Bargain Store.