With an impressive total of 7000 pocket springs in the king size version, our British Fleece Wool mattress incorporates market leading spring technology and superior natural fillings for a feel of luxury firmness. The benefits of wool Fleece wool makes the perfect mattress filling because of its unique crimped and elastic properties; our UK sourced wool is no exception offering its durability and natural springiness to the fillings of this mattress. It is also well known for its warmth and ability to regulate body temperature. Wool fibres inherently absorb moisture, and wick it away into the atmosphere to reduce humidity in bed. The natural properties of wool inhibit the growth of bacteria, fungi and dust mites making it a very hygienic, clean option. Additional fillings Egyptian cotton is added to this mattress alongside standard cotton and wool to give superior softness, added strength and cool comfort. Naturally strong and comfortable hemp fibres are blended with wool and linen to create an insulating under layer between the spring system and the comfort layers. These luxurious layers are held together with two rows of hand side stitching, and hand tufted with wool rosettes for even greater levels of durability. Revolution® pocket spring system Enjoy the enhanced comfort levels of this spring within a spring system for your most supportive night's sleep yet. Providing a medium to firm tension for all shapes and sizes of the human body, it boasts a two stage action. The larger outer spring offers a high degree of comfort as it yields to the body, while the inner spring gives a precise, highly supportive second action. As your body sinks into the mattress the inner spring is engaged delivering extra support when and where you need it. High density springs Combined with the ultra-supportive Revolution pocket spring, HD and Super HD springs distribute your weight correctly to reduce the build-up of pressure. Produced in a blanket sheet format, the springs are able to move up, down and side to side, as well as pivoting. This allows the surface of the spring 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, including Dual tension options, are available in store. Please call your nearest John Lewis to check before you visit. Please note: We recommend you visit one of our shops and try out your mattress choice before ordering online. Please note: not all our ranges are on displa