*Mattress Springs:1326 luxury pocket springs in 50 150cm, 1.52mm Vanadium steel springs, 54mm in diameter, individual sewn calico pockets, 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 in protective lambswool, finished with piped ticking. *Mattress Upholstery:Upholstered with a wool spring protector pad, then 1350gsm bonded British fleece wool and cotton, overlaid with 300gsm British fleece wool, 200gsm bamboo and finally 900gsm of blended British fleece wool and cotton, hand tufted with felt washers, covered with satin ivory Belgian ticking from our Collection. Other options are available. All Vispring mattresses carry a 30 Year Guarantee.. .