I bought this excellent mattress (very good for your back) from IKEA for $199:

　　/us/en/catalog/products//

　　Happy to sell for a lot cheaper than paid for it, as now I am leaving the country.

　　Superb condition

　　Details:

　　Key features

　　- Active-Response Coils respond independently to cradle your body and help relieve pressure points, while keeping your spine properly aligned.

　　- Response Coils are individually wrapped to insulate movements so you don't disturb your bed partner.

　　- A cushion of foam so your mattress is soft - yet resilient- on top.

　　SULTAN HANESTAD

　　Active-response coil mattress

　　$199.00

　　Product dimensions

　　Length: 74 3/8 "

　　Width: 37 3/8 "

　　Thickness: 8 5/8 "

　　Good to know

　　Comfort: Most firm.

　　273 springs/Twin size.

　　Care instructions

　　Clean with upholstery shampoo.

　　Product description

　　Incased Pocket spring coil: Steel

　　Frame: Polyurethane foam 1.5 lb/cu.ft., Polyurethane foam 1.5 lb/cu.ft.

　　Filling: Polyurethane foam 1.5 lb/cu.ft., Polyester wadding, Polyester/viscose (rayon) fiber wadding, Polyester/viscose (rayon) fiber wadding

　　Ticking/ Ticking: 68 % cotton, 32 % polyester

　　Length: 189 cm

　　Width: 95 cm

　　Thickness: 22 cm

　　Designer:

　　IKEA of Sweden

　　Package measurement and weight

　　Packages:: 1

　　Article Number: 401.978.82

　　Width: 38 1/2"

　　Height: 8 7/8"

　　Length: 75 1/4"

　　Weight: 42lb

　　Quantity: 1

　　Article Number: 401.978.82

　　Width: 98 cm

　　Height: 23 cm

　　Length: 191 cm

　　Weight: 19 kg

　　Quantity: 1