. *Mattress Springs:2,520 luxury pocket springs in 50 150cm, two layers of 1.32mm Vanadium steel springs, 51mm in diameter, sewn in individual calico pockets hand-formed into a honeycomb-nested unit. *Mattress Border:23cm deep with four 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 British fleece wool, then 1,525gsm hand-teased long-stranded horsetail blended with real Shetland Isle fleece wool, silk and mohair, enclosed in a hair-proof cambric cover, overlaid with 1,200gsm blended real Shetland Isle fleece wool and cotton.Covered with satin ivory Belgian ticking. Other options are available. Hand tufted with hand-tied woollen tufts and twine. All Vispring mattresses carry a30 Year Guarantee. .