Quick answer: mattress warranties usually cover visible, measurable indentations, not simply a mattress feeling softer. Common thresholds range from about 0.75 inch to 1.5 inches, depending on the brand and model.
Common sagging thresholds
| Example brand | Published threshold |
|---|---|
| Tempur-Pedic | Greater than 0.75 inch |
| WinkBeds | Greater than 1.5 inches |
| Brooklyn Bedding | Greater than 1.5 inches |
| Bear | Greater than 1.5 inches |
| Avocado | Typically 1.5 inches; some plush models differ |
These are examples, not universal rules. Always check the warranty attached to your exact mattress and purchase date.
Sagging vs. softening
Foam can soften with normal use without leaving a deep visible indentation. Manufacturers commonly exclude normal increases in softness when they do not affect the mattress’s pressure-relieving qualities or meet the stated defect threshold.
Measure without weight
Do not measure while someone is lying on the bed. Warranty thresholds generally refer to the visible indentation when the mattress is unloaded.
Foundation problems
A legitimate-looking indentation can still be denied if the mattress was used on an improper frame or foundation. Photograph center support and slat spacing when documenting sagging.
What to do next
Use our sag-measurement guide, then follow our warranty claim checklist. For brand thresholds, see the Yawnder warranty guide.