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 How is the Purple® Mattress for sex? Can the Purple® Mattress be without a platform? Can you feel the squares or grid pattern? Should I use a box spring with my Purple® Mattress? Does the Purple® Mattress come with a cover?