The Biomat® is firm for sleeping on
Some of my clients comment on how firm the Richway Amethyst Biomat® is. And yes, I do admit it takes some getting used to, even when using the cotton pad that comes with it.

Some of my clients already have a mattress pad, so they ask whether or not their mattress pad could be used on top of the Richway Amethyst Biomat®. The answer is: it depends on the material the mattress pad is made of.
Mattress pads made of natural materials are ok.

If your mattress pad is made of natural materials like cotton, wool or down feathers, then yes, it’s fine to use with the Biomat®. If your mattress pad is made of synthetic materials then I would not recommend using it with the Biomat®

Synthetic Materials interfere with the benefits of the Biomat®
The reason is the natural materials allow the healing properties of the Biomat® to easily reach you. Synthetic materials give off positive ions with counteract the negative ions the Biomat® creates, thus not allowing you to get the full benefit of the Biomat®. It is also possible that synthetic mattress pad could begin to melt on the Biomat® at the high temperature settings.

Consider the Thickness of the Mattress Topper
There is also one more thing to consider when using a mattress topper with the Biomat®: that is the thickness of the mattress pad. If you have a 2 inch thick mattress pad, then the Biomat®.won’t penetrate as deep into your body. You will also find that you need to turn the Biomat setting up higher, than if you were to use the Biomat®.without a mattress topper.