Mattressmakers memory mattress arrives topped with a dense layer of memory foam to comfortably hold the body's natural shape. supported bu a quality germain bonnell spring unit. Mattress Specifications Non turn quilted coverCotton feltCoir fibreMemory foam13.5 guage bonnelle spring unitComes to you rolled and vacuum packed for your convenience Dimensions Approx. 3ft Single: 90cm x 190cm x 20cm 4ft6 Double: 135cm x 190cm x 20cm 5ft King-Size: 150cm x 200cm x 20cm 65kg/M3 density memory foam 18cm - 20cm overall mattress depth As with nearly all mattress retailers we are unable to accept "used" mattresses for return for health and hygiene reasons. By used we mean mattresses that have been removed from their packaging. Therefore we would like to advise customers to try the mattress on the bed with the packaging still on, only remove once you are happy with the product and are willing to keep it. If you find that the mattress is not suitable for you then we are very happy to collect the mattress in its original packaging however this would incur a charge of £30.00 to cover the courier cost and we would deduct this from the final refund that would be.