With the Hybrid 1400 king mattress, you have endless possibilities for restful sleep. Feel the support of a truly traditional coil mattress which contours to your body for a comforting feel. High-density foam provides the firmness you love. Gel memory foam provides restorative support for your lower back. Comfort level: plush. 3″ high-density gel memory foam lumbar support. 3″ high-density cushion plush foam. ” high-density base foam. 8″ power packed wrapped coil system. 900 individual power packed wrapped coils.