Memory foam mattresses are temperature-sensitive. This makes them able to react to body heat and mould to your body shape accordingly. They become softer in the heat and firmer in the cold. ... This should get your mattress softer in no time.

How do you soften a memory foam mattress?

The best way to make a memory foam mattress softer is to sleep on it every night for up to 60 nights, keep the room warm (at least 20–22 °C (68–72 °F)), and apply controlled pressure to the memory foam using your hands or by rolling on the mattress for 10-30 minutes daily for up to 30-60 days because this will help the ...

Do memory foam mattresses get less firm over time?

Give it some time

If you just purchased a new bed, it may simply take some time to "break in" the mattress. If you purchased a "bed in a box" or memory foam mattress that came compressed inside a box, it may take some time to fully expand and could feel less firm over time.