The Ortho Coil mattress is 25cm in depth, constructed from a 12.5-gauge open coil springs unit, with edge to edge support to provide a medium to firm comfort support. The open Coil mattress is designed to be a great solution for individuals who are suffering from joint aches and back pain. For an extra premium feel and quality there are generous layers of fillings and a deep quilted damask fabric giving the best quality as well as orthopaedic support. This mattress is not vacuum packed or rolled. It is delivered flat to ensure you receive a high quality mattress. Made in the UK- 1 Year Manufactures Warranty. Knight Sleep Quilted Ortho Coil Mattress in White Size: Super King