*Mattress Springs:1,326 luxury pocket springs in 50 150cm, 1.52mm Vanadium steel springs, 54mm in diameter, sewn in individual calico pockets and hand-formed into a honeycomb-nested unit. *Mattress Border:21cm deep with two rows of genuine hand side-stitching, horizontal handles, air vents on all sides, border edges upholstered with coir and wool, hand finished with piped ticking. *Mattress Upholstery:Upholstered with 1,200g layered British Exmoor Horn wool, TENCEL and 1,200g of Horsehair. Overlaid with 300g of British fleece wool. Covered with the finest quality Belgian ticking from the Vispring collection. Hand tufted with felt washers. All Vispring mattresses carry a30 Year Guarantee..