No, modern hybrid mattresses do not benefit from a box spring. But your bed will need a good support so you will need to find a base that works with your bed. You can, of course, put the mattress on the floor as that will definitely provide the support your mattress will need to prevent sagging. A foundation is basically anything that supports, raises and houses your mattress and usually consists of a wooden frame and slats. Foundations are firmer bed bases than box springs because they’re springless, which makes them the perfect base for your foam or hybrid mattress. There are many options of platforms and foundations you can choose from to use under your mattress.