Does the Purple® Mattress go on top of an existing bed? The Purple® Mattress was not designed to be a mattress topper. You may lose many of Purple benefits if it is used this way. Related articles Can you feel the squares or grid pattern? Does the Purple® Mattress come with a cover? Is there an adjustment period for the Purple® Mattress? What is the coil system? Are they springs? Can you use a heated mattress pad on the Purple® Mattress?