You can never have too much back support, especially when you sleep on a firm king mattress set from Rooms To Go. Offering the type of comfort and support that ensures proper rest and good health, the firmness of each mattress results in an even distribution of body weight and keeps the spine aligned throughout the night. Our mattress selections typically contain wrapped or pocketed coil systems combined with additional foams and gels that conform to your body shape and keep excess heat and moisture away. Choose from a wide range of leading brands committed to fine design and superior quality. Perfect for all types of sleepers, our firm king mattress sets ensure pleasant nights of rest and relaxation.