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? Is there an adjustment period for the Purple® Mattress? Does the Purple® Mattress come with a cover? What is the correct direction for the Purple® Mattress to lay? What is the coil system? Are they springs?