Kaymed Sunset 200 Mattress in a Box - 4ft Small Double; The Kaymed Sunset 200 vacuum packed foam mattress is a deep and luxurious foam mattress that offers great comfort and support. Upholstered in a removable soft stretch knit fabric, the mattress contains a block foam foundation, topped off with reflex foam layer. The Sunset 200 is similar in construction to our entry level Sunset 150 mattress, but is 5cm deeper and features the K Zone support system. A unique support system introduced by Kaymed, the K Zone is a series of deep channels running across and down the length of the mattress. These channels allow the top layer to flex with your body shape providing additional support and help maintain the correct spinal alignment. As its a non-spring mattress, the foam works for each individual person with no roll together and no partner disturbance across the mattress. The mattress is one-sided and does not need to be turned over, but we do recommend you turn the mattress from head to toe regularly. With a full 10-year warranty you get the peace of mind that you are sleeping on a Kaymed, the worlds leading foam mattress manufacturer.