This Silent Knight Ortho Bed is 3 on the orthopaedic guide with 4 being the firmest. Silent Kight as in knights of old, knights on horseback defending your right to a Good Night’s sleep. This orthopaedic spring unit will support you happily, along with the orthopaedic firm padding, gives you the end user the firm feel you want from an orthopaedic supported bed. No orthopaedic bed is a magic wand – it won’t make your bad back disappear for ever but it will help support you, and support you well allowing you to sleep better. Available as mattress only or with a base with and without drawers also Available in all sizes from single to superking.