This is an especially valuable Mattress features for hare a bed with a Restless Partner.HR Foam is the highest grade of PU foam and its elasticity helps to prolong the comfort life of a mattress. The more high resiliencyfoam, the longer you can expect the mattress to retain its comfort level.With regular use HR Foam last long years,so it typically carry a strong warranty.The combination with super softy foam give the mattress feel more softness.The BELLO Emrald-is available in two side pillow top and can rotate periodically to enhance its life for longer period.