Features we love Crystal\'s great value king size foam mattressMade from reflex foam with a memory foam top layerOffers medium firmness with orthopaedic supportHypoallergenic fabric with a zip-off washable coverManufactured in the UK and comes with a 1 year warrantyApproved by the National Bed Federation All about meThe Crystal mattress is packed with features to deliver a better night\'s sleep. It is of medium firmness with orthopaedic design qualities. Made from reflex foam with a top layer of memory foam the mattress is heat and pressure sensitive conforming to your body shape to relieve pressure points.It\'s an ideal choice for allergy sufferers as it has sanitised fabric and is hypoallergenic plus the cover easily zips off so you can throw it in the washing machine.You can rest assured that the Crystal mattress has been made in the UK tested to meet British Standard regulations and is NBF approved and it comes with a one year warrantyNeed to know . Dimensions . H16 x W135 x D190 cm Weight . 26 kg Size . Standard UK double (4ft6) Comfort . Medium Type . Reflex foam Filling . Memory foam top layer Finish . Stretch knit Flippable . NoMade in the UKTested to meet British Standard Regulations BS71771 Year warrantyMore sizes available DELIVERY RESTRICTIONS . Please note we are only able to ship Crystal to UK Mainland postcodes. We are unable to ship to Ireland Northern Ireland Scottish Highlands or the Channel Islands.. .