Memory foam traps heat at the surface. Here is how cooling pads, toppers, and breathable bedding can make it sleep cooler.
Memory foam is great at contouring, but it also traps heat at the surface. The solution is not necessarily a new mattress. It is a better surface layer that vents heat and moves moisture.
Start with the short list in best for memory foam and the material breakdown in gel mattress pads.
For a low-profile add-on, the MellowSleep Cooling EasyFit Sheet review is a good starting point. If you want a heavier comforter that still feels cooler, see the MellowSleep MarshMellow comforter review.
See does your mattress cause sweating? for a broader troubleshooting guide.
Cooling memory foam is about airflow and surface temperature. The best cooling pads list and the buying guide will help you narrow down options quickly.