What kind of bed base do you need for a pocket spring mattress?

A pocket spring mattress works on any flat base that offers enough support: a slatted base, a sprung base or the base of a box spring. Make sure the slats are not spaced too far apart, otherwise the core will sag in places and you will lose both comfort and lifespan. If you are replacing a mattress that has been on the same base for years, check that the base itself has not sagged.