A bed foundation is critically important to a mattress’s performance and your comfort. Sleeping on the wrong foundation can cause your mattress to prematurely dip and sag, so proper support is a must. At the same time, certain foundations may cause heat to become more readily trapped inside your memory foam mattress. While most foundations and frames should work for your new mattress, foundations that have spaces to let air flow through the bottom and clear out accumulated heat may prevent overheating best. Zoma, recommends a foundation with slats no more than 3 inches apart and at least 0.5 inches thick.