*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 horsehair, needle-teased onto hessian and enclosed in a hair-proof cambric cover.Overlaid with 1,000gsm bonded British fleece wool and cotton and then 1,200gsm blended British fleece wool and cotton.Covered with satin ivory Belgian ticking from the Vispring collection.Other options are available. Hand tufted with felt washers. All Vispring mattresses carry a 30 Year Guarantee. Mattress Sizes and weight. *Single 90 x 190 cm:35 kg *Double 135 x 190 cm: 52 kg *King 150 x 200 cm: 61 kg *Super King 180 x 200cm - 6ft 182 x 200 cm: 75 kg