Serenity Memory Foam Without Spring MattressThis SERENITY mattress the best part of using a High density memory foam mattress is that it provides the ultimate lumbar support to the body. Any pressure felt in bed, especially in the pressure points like the joints of the body, is negated when lying on a memory foam mattress. This is because of the body contouring nature of the mattress and the fact that the body weight is evenly distributed Every night comfort, great support & value for money.