All Lumina® mattresses are constructed around our pocketed spring support system. Each coil spring is individually encased in its own lightweight, durable fabric pocket. This design allows each coil to respond independently to improve support and virtually eliminate motion transfer. This exceptional pocketed spring support system is complimented by our 6-sided total foam encasement to further improve stability and expand the usable sleep surface. Deep Comfort for Deeper Sleep Lumina® mattresses are available with an array of the finest comfort materials in the top upholstery layers to enhance pressure relief and back support. By utilizing only the finest available foams and fibers, you are assured of deep, luxurious sleep year after year.