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. A thick layer of high density reflex foam is used to act as the support mechanism in this mattress. Unlike memory foam, reflex foam does not mould to your body as much and bounces back fairly quickly. Due to these special properties, it is a fairly firm material which will provide a support to a mattress to ensure your weight is distributed properly. Mattress comes with a zip off cover which is dry cleanable. Specification High Density Reflex Foam Silent - no sprngs 15cm thickness Dry cleanable zip off cover Available in Regular or Firm comfort Orthopedic mattress Sanitised Fabric Hypoallergenic 5 year warranty Anti dustmite features Made to british standards/regulations Mattress Sizes 3ft (W90 x L190 cm) 4ft (W120 X L190cm) 4ft6 (W135 x L190 cm) 5ft (W150 x L200cm) This mattress is rolled and vacuum-packed, so please allow up to 12-24 hours to expand to its natural depth before use.