The Stearns and Foster Lux Estate Ultra Firm Mattress pairs traditional mattress technology and high-quality comfort materials such as luxurious silks and soft cashmere to give you a comfortable and supportive sleep experience. The Stearns and Foster proven innerspring system offers superior support and performance. This unique, highly advanced innerspring system is the foundation for support, while layers of comfort materials give you sublime pressure point relief. With the Stearns and Foster Lux Estate Ultra Firm Mattress, you get a restful and comfortable night’s sleep and wake up refreshed regardless no matter if you sleep on your back, side or stomach. | Stearns and Foster Lux Estate Ultra Firm Split California King Mattress Set | Gray/Silver