. *Mattress Springs:1,720 luxury pocket springs in 50 150cm, 1.32mm Vanadium steel springs, 48mm in diameter, sewn in individual calico pockets and hand-formed into a honeycomb-nested unit. *Mattress Border:21cm deep with three 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 600gsm softly needled British fleece wool, then 950gsm hand-teased real Shetland Isle fleece wool, overlaid with two layers of 300gsm British fleece wool.Covered with finest quality Belgian ticking from the Vispring collection.Hand tufted with hand-tied woollen tufts and twine. All Vispring mattresses carry a 30 Year Guarantee. .