To mark our 150th year, this zip link mattress combines 150,000 springs (in the kingsize) with a complex blend of luxury natural fillings. Layers of Suffolk, Swaledale, Texel, Leicester and cashmere wool; Egyptian cotton and mohair; and Herdwick wool and angora help regulate body temperature and provide breathability and softness for a supremely comfortable and hygienic night's sleep. These decadent layers are paired with the Super HD and Revolution® pocket spring systems which provide superior postural support night after night. The Revolution® system combines an outer and inner spring for heightened support, whilst the HD layers move and pivot to tailor the surface to every contour of your body Please note: Not all of our ranges are on display in our furniture departments. Please call href="" www.johnlewis.com="" your nearest John Lewis to check before you visit. Interest Free Credit: If you buy this product in our shops, it's eligible for Interest Free Credit, which is available when you spend £1000 or more on selected home products. Terms and conditions apply: href="http://www.johnlewis.com/inspiration-and-advice/interest-free-credit" find out more