Sleep Balance TFK - Box spring mattress with gel effect foam topper: Sleep Balance TFK offers restful sleep and optimum regeneration. A good night's sleep is essential for an active lifestyle. The Sleep Balance TFK box spring mattress has been specially developed for people who value optimum regeneration and body-orientated sleeping comfort. With a perfect blend of elastic and supportive elements, the mattress offers relief for the spine and muscles and provides the necessary rest between strenuous days. The Sleep Balance TFK box spring mattress has a comfortable height of around 23 cm. Flexibility for healthy sleep - different firmness levels for body-orientated sleeping comfort. The Sleep Balance TFK box spring mattress has a soft and a hard side, which can be used by simply turning the mattress over.