Allergen Protect With Pressure Relieving Foam:  The Sealy Posturepedic Alco Firm Queen Mattress is protected from common allergens and helps it stay fresh and healthy, ensuring that you have a good night’s rest. StayTrue Sealy Foam in the comfort layers of the Sealy mattress, your body will be supported with different comforts throughout the night. Double Offset Spring System:  Unlike other mattresses, the mattress of Alco Firm Queen is made with Sealy’s exclusive Double Offset Spring System.  Double Offset Spring System has been designed in partnership with Orthopedic Surgeons and has a unique hinging action, that ensures correct back support with no roll-together. Zone Support:  The Sealy Posturepedic Alco Fim Queen Mattress has a high-density foam to provide body support in the center by adding additional support to the lower back en reduces body impressions in the queen mattress, therefore allowing your muscles to relax and recover. Duraflex Form Encased Edge Support:  One of the extra benefits of the Sealy Posturepedic Alco Firm range is its high-density foam encased border.  This a great feature that surrounds and supports the edge of the spring system.  There will be an increased sleeping area and edge support will prevent you from experiencing the feeling of ‘rolling off” your bed when you sleep close to the edge of the mattress.