With a total of 12,000 pocket springs in the king size model and three rows of hand side-stitching, our Natural Collection Wensleydale Wool mattresses incorporate market leading spring technology with luxurious natural fillings to offer a truly superior response. This zip link model can be used as one large mattress or two independent mattresses depending on your needs. Luxury Support Our Luxury Support range of mattresses provide a sumptuous feel that's cloud-soft and gently supportive. Natural fillings Generously upholstered with a unique blend of natural, hand-teased fillings that include; cotton, hemp, linen, Egyptian cotton and Wensleydale wool, and combined with unrivalled craftsmanship, this sumptuous mattress cradles the body for a deep and supportive feel. Wensleydale Wool comes from a rare breed of sheep, sustainably reared on a farm in Yorkshire. The wool boasts a long staple with a natural curl, making it one of the softest and finest mattress materials and creating a superior sleep space. Its blend of wool and cotton additionally helps to keep temperatures regulated throughout the seasons, with wool acting as a strong insulator and cotton offering a breathable, cool layer. Revolution® and High Density pocket spring system Featuring a unique, high density pocket spring system to deliver enhanced support and comfort, it boasts a two-stage action that allows air to circulate through the mattress effectively. The larger outer spring yields to the body, while the inner spring offers direct and precise support when and where you need it, becoming engaged as your body sinks into the mattress. Super HD springs also work to distribute your weight evenly in order to reduce build-up and pressure. Produced in a blanket sheet format, the springs can move freely to contour with the exact shape of your body. Environmentally sound The John Lewis Natural collection has been designed to be recyclable at the end of its life by using natural upholstery fillings. Even the steel used in the patented pocket spring system is 100% recyclable. Our manufacturers, Spink & Edgar are the only bed makers in the world with a farm where they raise sheep for wool and grow luxury fibres for use as fillings in their mattresses. Using locally grown fibres, crops and wool lessens the impact on the environment by dramatically reducing CO2 and greenhouse gas emissions. Alternative mattress tensions are available in store. Please call your nearest John Lewis to check before you visit. Extend the life of your new mattress with a durable and breathable mattress protector. . Please note: We recommend you visit one of our shops and try out your mattress choice before ordering online. Not all our ranges are on display in our shops. For more information, please speak to a furniture Partner in store, or call 03452 661805 and we can tell you where the range you'd like to view is on display. Call 03456 065019, or visit our shops.