The Reflex Pocket Platinum mattress uses high density reflex foam. Reflex foam is firm and provides extra body support. The Reflex Pocket mattress has a 8cm boundary made of reflex foam around the springs to prevent you from rolling off the mattress while you sleep. The actual springs are individually wrapped which creates a system to provide extra comfort. This mattress comes complete with a beautiful cover which is zip off and dry cleanable. Specification High density reflex foam Individually wrapped pocket spring system Reflex foam boundary around springs 24cm thickness Dry Cleanable cover Zip off cover Regular comfort only Orthopedic mattress Ecological Sanitised fabric 5 year warranty Anti dustmite features Made to British Standards/regulations Mattress Sizes 3ft (W90 x L190 cm) 4ft (W120 x L190 cm) 4ft6 (W135 x L190 cm) 5ft (W150 x L200 cm) 6ft (W180 x L200 cm) This mattress is rolled and vacuum-packed, so please allow up to 12-24 hours to expand to its natural depth before use.