The Massimo Firm Tight Top mattress set by Sealy Posturepedic features the CleanProtect™ cover to help maintain freshness and reduce bacterial-associated staining, SealyAir™ Fibers that adjust to changing positions for a refreshed sleeping environment, CertiPUR-US SealyComfort™ Gel HD Foam that conform and cushion for your most comfortable night's sleep, a layer of Proback® Quilt with targeted GelBoost™ HD Memory Foam designed to fit the curves of your body, offering durable and personalized support and comfort, SolidEdge™ HD to increased the sleeping surface and provide a solid seating edge and the SealyResponse™ HD Pocket Coils that reduces motion transfer, and provide even more support and comfort.