This mattress is vacuum packed and rolled for quick and easy transport. We use powerful machines to compress the mattress and then suck our all of the air within. The mattress is then rolled up and secured ready for dispatching. Mattress requires up to 72 hours to fully expand once opened. Feel safe and assured that you are buying a product that has been manufactured within the UK by us and conforms to all British fire regulations. FEATURES:• Material : Memory Foam• 2.5cm Revo Vasco And 2.5cm Revo Comfort And Pocket Springs• Promotes good blood circulation• 23cm overall depth• Orthopaedic mattress• Sanitised fabric• Hypoallergenic• Anti dust mite features• Made to British Standards/Regulations• Vacuum packed and rolled• Suitable for any UK standard size base• Fantastic-value, only at Elegant Furniture UK DIMENSIONS:• Mattress Size : Double Mattress