The HL Memory Foam Mattress is made from unique upper layer of high density visco-elastic polymer gel. Originally designed for NASA missions, it is soft and pliable following the outline of your body perfectly. So comfortable, the mattress provides the best possible support to your spine allowing your body to immediately find the best sleeping position, reducing tossing and turning. The extraordinary features helps blood to flow and circulate freely, preventing the nerves and muscles from numbing. With the HL Memory Foam Mattress available in Regular and Firm comfort and with a soft, dry cleanable zip off cover, you are spoilt for choice. Specification 5cm Visco foam with high density foam underneath 20cm thickness Dry cleanable zip off cover Available in regular and firm comfort Orthopeadic mattress Sanitised fabric 5 Year warranty Anti dustmite features Made to British Standards/Regulations Mattress Sizes 3ft (W90 x L190 cm) 4ft (W120 X 190cm) 4ft 6 (W135 x L190cm) 5ft (W150 x L200cm) 6ft (W180 X 200cm) This mattress is rolled and vacuum-packed, so please allow up to 12-24 hours to expand to its natural depth before use.