The Sleep Council recommends you buy a divan base and mattress together because the two are designed and manufactured to complement one another in terms of support. Do not use a new mattress with an old divan base or an old bedstead, which incorporate a sprung-system (either metal springs or sprung slats) – an imperfect base, with a worn and tired sprung-system, will provided a reduced level of support and could result in premature wear and invalidate the guarantee.