. *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 300gsm British fleece wool then 1,700gsm of hand-teased Platinum Certified Devonshire fleece wool. Overlaid with 600gsm of British fleece wool. Covered with your choice of finest quality Belgian ticking from the Vispring collection. Hand tufted with felt washers. All Vispring mattresses carry a 30 Year Guarantee.. .