Features innovative sustainable sleep technologies. It combines an open coil core with eco-friendly fibres. Superior performance polyester filling that is manufactured from a highly sophisticated blend of three polyester fibres, including an advanced elastomeric binder fibre. With sustainability at the forefront, the polyester within this mattress is 100% recyclable at the end of life and can be upcycled into an alternative product. The sophisticated and refined blends of both coarse and fine fibres are engineered to provide support and recovery. The Sareer Alder is rigorously tested to show outstanding performance and durability, retaining its comfort and support for many years. Free from FR chemicals the polyester used in this mattress is inherently flame retardant. This process of manufacturing offers maximum spinal support as well as eliminating rolling together so that you and your partner can enjoy a peaceful night’s sleep.