The Dynasty Mattress range fairs well when it comes to memory foam single mattress orthopaedic - https://www.whitemetalbunkbeds.co.uk/orthopaedic-mattress/ requirements. They are readily available in 10, 12 and 14 inch thick variation; Fulfilling the unofficial requirement of a minimum of 10 inches thickness. They have a memory foam density of 5.3 pounds (lbs). This fits nicely into the informal standard of in between 5 and six pounds.<br> <br> <br> <br> <br> <br> <br> <br>