1800 (150cm Kingsize) individually nested pocket springs combine with the ultra supportive Posturetex foam, resilient white fibre, super soft blended cotton and polyester to make a supremely comfortable mattress Boasting a super sumptuous pillow-top layer of soft white fibre and Posturetex foam which provides luxurious cushioning and support The twin layers of pocket springs work independently, responding to the contours of the individual sleeper's body providing superb resilience with optimum comfort and support for a good nights sleep A traditonally hand tufted, easy care mattress that need never be turned - though end to end rotation is recommended Upholstered in the highest quality ticking which is exclusive to Sleepmasters and is intrinsically soft, colourfast and breathable Mattress depth - 33cms This mattress can be ordered with a Zip & Link option for Kingsize and Super Kingsize. This can help if you have restricted property access and also if you require different tensions on each side.