The Colney Ortho is made in the UK by Highgrove Beds, and is 25cm deep and upholstered in a resilient and attractive damask cover that benefits from a hand tufted finish for extra strength and durability. Hand tufting ensures its deep layers of upholstery are held firmly in place by passing tapes through the mattress and securing them on both sides with a cotton tuft. The interior of the Colney Ortho is made up of a robust 12.5 gauge open coil spring system, one of the firmest springs used. Its an extremely hard wearing system that is made up of rows of hourglass shaped springs connected at the top and bottom by a spiral wire. The Colney Ortho provides an orthopaedic, extra firm support and is buil to last. The Colney Ortho comes with a 5 year Warranty.