If you require extra support for your back and shoulders, the Merriam Ortho Mattress provides it perfectly. It uses a 12.5g orthopaedic spring unit and has reinforced rod edge support found around both the top and bottom which prevents it from tipping and losing shape. The mattress is topped with layers of polyester fillings and is designed to provide your body with ample support throughout the night. The mattress comes finished with a grey border and is covered with a deep line fabric on both sides, allowing you to have a much more natural sleep experience. Expertly hand-tufted, this technique keeps the layer of fillings from shifting and sagging over time whilst improving the integrity and durability of the mattress. As a double-sided mattress, it has fillings on both sides making it a more usable sleeping surface and offering greater comfort.