An Ortho foam quality mattress provides firm orthopaedic support when used on either a divan base or a bed frame, helping to maintain the correct alignment of the spine and neck for a healthier and comfortable night sleep. Similar to the Ortho Duo 1800 mattress, both sides of the mattress has different modes of softness. One side is regular comfort, while the other is firm comfort and with Hypo-allergic properties, this mattress is perfect for children. Mattress comes complete with a zip off cover which is dry cleanable. Specification. High Density Reflex Foam. 11cm thickness. Dry cleanable double jersey cover. Zip off cover. One side is Regular while the other side is Firm comfort. Orthopedic mattress. Siliconised Fiber. 5 year warranty to all customers. Anti dustmite features. Made to british standards/regulations. Hypo-allergic mattress for kids.