. Mattress Technology:. *Two layer hand-nested calico pocket spring construction. *Springs diameter: 49mm *2,812luxury pocket springs in 50 150cm width. Mattress Upholstery:. *Upholstered with exclusive natural fillings: *Alpaca *Bamboo *Cashmere *Horsetail *Cotton *Platinum Certified real Shetland wool. *Finest quality ticking. *Hand-tied woolen tufts and twine. Mattress Border:. *Upholstered with coir and wool. *Fiverows of hand side-stitching. *Horizontal handles. *Air vents. *Mattress depth: 25cm. All Vispring mattresses carry a 30 Year Guarantee.. .