Do Memory Foam Mattresses Get Softer? How They Change Over Time

If you’ve just bought a new bed and you’re wondering “Do memory foam mattresses get softer?”, you’re not alone. Many sleepers notice that a fresh memory foam mattress feels firmer than expected in the first few nights or weeks.

This FAQ-style guide explains why memory foam softens, how long it usually takes, what’s normal, and when firmness changes may be a sign of a problem.

What Is Memory Foam, and Why Does It Feel So Firm at First?

Memory foam is a viscoelastic foam that responds to heat and pressure. When you lie down, it slowly softens and contours around your body, then returns to its original shape when you get up.

A new memory foam mattress can feel firmer out of the box because:

  • The foam is fresh and hasn’t been broken in by repeated use.
  • It may still be adjusting after being compressed for shipping.
  • The room or mattress itself may be cool, which makes memory foam feel stiffer.

As the material warms up from your body heat and regular use, many sleepers notice it becoming more pliable and “broken in”.

Do Memory Foam Mattresses Get Softer Over Time?

Yes, memory foam mattresses generally do get softer over time, especially in the first weeks and months of regular use.

This softening happens because:

  • The cell structure of the foam relaxes as it is repeatedly compressed and released.
  • Your body weight and sleeping position gradually create a more familiar contour in your usual sleeping areas.
  • Any initial manufacturing or packaging stiffness tends to fade.

However, normal softening is gradual. It should feel like the mattress is breaking in, not collapsing.

How Long Does It Take for a Memory Foam Mattress to Break In?

The break-in period can vary, but many memory foam mattresses noticeably soften within the first few weeks.

Typical timeline

  • First few nights: Mattress feels firmer and may not contour as deeply.
  • 2–4 weeks: The foam usually starts to feel more responsive and comfortable as it adjusts to your body.
  • First few months: Most of the natural softening and “settling” occurs in this period.

If you are asking “Do memory foam mattresses get softer?” right after delivery, it’s likely you’re still in this normal adjustment window.

How Can I Tell Normal Softening From Sagging or Wear?

Some change in feel is expected, but excessive softening can indicate wear.

Normal softening:

  • The mattress still supports your spine evenly.
  • You don’t see a noticeable dip when the bed is empty.
  • Comfort improves or remains consistent.

Potential sagging or wear:

  • Visible body impressions or dips that stay even after you get up.
  • You feel like you’re “stuck” in a hole or rolling toward the middle.
  • Support feels uneven, especially around the hips or lower back.

If the mattress loses support quickly or develops deep impressions early on, that goes beyond the usual break-in process.

What Affects How Soft a Memory Foam Mattress Will Get?

Several factors influence how much and how quickly a memory foam mattress softens:

  • Foam density:

    • Higher-density foams tend to feel firmer and more durable, softening more slowly.
    • Lower-density foams may soften more quickly, sometimes at the cost of long-term support.

  • Room temperature:

    • Cooler rooms can make memory foam feel firmer.
    • Warmer environments often make it feel softer and more conforming.

  • Body weight and sleeping position:

    • Heavier individuals may notice faster softening in their usual sleeping areas.
    • Side sleepers often prefer slightly softer foam for pressure relief, while back and stomach sleepers may notice firmness changes more in their midsection.

  • Base or foundation:

    • A solid, supportive base can help the mattress maintain its structure.
    • Flexible or unsupportive foundations can cause the foam to feel softer or uneven over time.

Can I Help My Memory Foam Mattress Soften More Evenly?

If your new bed feels a bit too firm, there are gentle ways to encourage a more even break-in:

  • Spend extra time lying or sitting in different areas of the mattress.
  • Allow the mattress to fully expand after unboxing and give it time before judging its long-term feel.
  • Keep the bedroom at a moderate temperature, as very cold rooms can keep foam firm.

These steps support a gradual, even softening rather than sudden compression in one spot.

✅ Quick Mattress Takeaways

Key points to know about “Do Memory Foam Mattresses Get Softer”

  • Yes, memory foam mattresses do get softer, especially during the first few weeks and months.
  • Early firmness is normal and often related to break-in, packaging, and room temperature.
  • Foam density, body weight, and foundation type all affect how much the mattress will soften.
  • Normal softening should feel like improved comfort, not like sinking into a deep permanent dip.
  • Visible, lasting sagging or impressions may signal wear rather than ordinary softening.
  • Allow time for adjustment before deciding whether the mattress is too firm or too soft for you.

Understanding how and why memory foam mattresses get softer can make the adjustment period feel more predictable and less concerning. With realistic expectations about break-in, support, and long-term changes, it’s easier to judge whether your mattress is simply settling in or showing signs of early wear.