The Night Therapy 12" Memory Foam Hybrid Mattress combines several mattress technologies to give you the best night's sleep. The Fusion Gel memory foam layer ensures an ideal sleep temperature and optimal memory foam support. The ViscoLatex layer provides added comfort, while the iCoil innerspring delivers pressure-relieving support and reduces motion transfer for uninterrupted sleep. The Comfort Cover is made of foam and fiber-quilted jacquard fabric.