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Why is My Pillow Top Mattress Sinking?

June 16, 2024 3 min read

If you've noticed that your pillow top mattress is sinking, you're not alone. Over time, even the most comfortable and supportive mattresses can start to show signs of wear and tear. A sinking mattress can lead to discomfort and disrupt your sleep, but understanding the causes can help you address the issue and potentially extend the life of your mattress. In this blog post, we'll explore the common reasons why a pillow top mattress might sink and offer solutions to help you restore its comfort.

Understanding Pillow Top Mattresses

A pillow top mattress is designed with an extra layer of padding sewn onto the top surface, providing additional cushioning and a plush feel. This layer can be made from materials like memory foam, latex, or fiberfill, offering enhanced comfort. However, the added softness can also make pillow top mattresses more prone to sinking over time.

Common Causes of Sinking

1. Wear and Tear:
Like any product, mattresses are subject to wear and tear. Over time, the materials in your pillow top mattress can break down, leading to a loss of support and the formation of indentations. Regular use, particularly if you sleep in the same spot every night, can accelerate this process.

2. Poor Quality Materials:
Not all pillow top mattresses are created equal. Mattresses made with low-quality materials are more likely to sag and lose their shape. If the foam or padding in your mattress is of inferior quality, it will compress more quickly, resulting in a sinking feeling.

3. Lack of Proper Support:
A mattress needs a solid foundation to provide adequate support. If your bed frame or box spring is old, damaged, or not designed to support a pillow top mattress, it can cause your mattress to sag. A weak foundation means the mattress cannot distribute weight evenly, leading to indentations.

4. Inadequate Rotation:
To maintain even wear, it’s essential to rotate your mattress regularly. Failing to do so can cause certain areas to bear more weight than others, leading to uneven wear and sinking spots.

Solutions to Prevent and Fix Sinking

1. Rotate Your Mattress:
Rotate your mattress 180 degrees every three to six months. This helps distribute the wear evenly across the surface, preventing specific areas from sinking more than others.

2. Use a Mattress Topper:
A high-quality mattress topper can provide an additional layer of support and comfort, reducing the pressure on the existing pillow top layer. This can help mitigate the effects of sinking and extend the life of your mattress.

3. Check Your Foundation:
Ensure that your bed frame or box spring is in good condition and suitable for your mattress type. A sturdy, supportive foundation can prevent your mattress from sagging and help maintain its shape.

4. Replace Worn-Out Components:
If your mattress is relatively new but already showing signs of sinking, it might be worth checking if the problem lies with the mattress or the foundation. Replacing a worn-out box spring or adding extra slats to your bed frame can provide better support.

5. Invest in Quality:
When buying a new mattress, invest in one made with high-quality materials. Look for high-density foam or latex, which tend to retain their shape better over time. Research customer reviews and ratings to ensure you're purchasing a durable product.


A sinking pillow top mattress can be frustrating, but understanding the causes and implementing the right solutions can help you restore its comfort and support. Regular maintenance, such as rotating your mattress and ensuring proper foundation support, is crucial in preventing premature sagging. If your mattress is old or made with low-quality materials, it might be time to consider investing in a new, high-quality mattress that will offer better durability and comfort.

By taking these steps, you can enjoy a good night's sleep without the discomfort of a sinking mattress, ensuring you wake up refreshed and pain-free.