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; some models use different cutoffs.
Common sagging thresholds
| Example brand | Published threshold |
|---|---|
| Tempur-Pedic | Greater than 0.75 inch for non-quilted models; greater than 1.5 inches for quilted models, according to its current support guidance |
| WinkBeds | Greater than 1.5 inches |
| Brooklyn Bedding | Greater than 1.5 inches under its current limited lifetime warranty |
| Bear | Greater than 1.5 inches under its current limited lifetime warranty |
| Avocado | Generally 1.5 inches or more; 2 inches for Luxury Plush Pillow-top and Ultra Plush Box-Top, and 0.75 inch for crib mattresses, per Avocado’s current guidance |
These are examples, not universal rules. Always check the warranty attached to your exact mattress and purchase date. If a claim has already been declined, see what to check after a warranty denial.
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.
How to Take a Useful Measurement Photo
Remove sheets and any removable topper, and let the mattress rest without anyone on it. Place a straightedge or a taut string across the sleeping surface as the manufacturer instructs, then position the ruler vertically at the deepest point without pressing the mattress. Capture a wide photo showing the full setup and a close-up where the ruler markings are legible.
Do not use the height of the mattress edge as the sag depth. Some designs have raised quilting or intentionally rounded edges, and measurement rules can differ; use the claim administrator’s method and ask how it treats the specific construction.
What “greater than” means for a claim
Read the exact wording. A threshold of greater than 1.5 inches is different from at least 1.5 inches: an exact 1.5-inch measurement does not exceed 1.5 inches. Measurements near the cutoff can be difficult to photograph precisely, so take clear pictures and ask the warranty administrator how it evaluates the evidence. A qualifying measurement is only one condition; proper support and the other warranty terms also matter.
Build a claim file before contacting the seller
- Locate the order receipt, model name, size, purchase date and warranty that applies to that purchase.
- Remove bedding and photograph the full sleeping surface. Measure the depression without body weight using a straightedge or taut string and a ruler, following the manufacturer’s specific instructions.
- Photograph the base, its center support, and slat spacing. Check whether the manufacturer requires testing on a particular surface before moving the mattress.
- Include pictures of the product law label and any other damage or identifying details requested in the claim form.
- Ask who handles the claim, whether inspection or shipping costs apply, and what remedy is available. If purchased through Yawnder or another retailer, start with the seller and follow the terms applicable to that order.
If your claim is denied
Ask for the reason in writing and the specific warranty provision used. If the decision concerns the measurement or foundation, request the manufacturer’s measurement method and evidence requirements; provide clearer photos or missing documents where appropriate. Keep the original purchase records and correspondence. An appeal may be possible, but a deeper impression or a replacement is not guaranteed.
Comfort trial or defect warranty?
A trial is generally about whether a recently purchased mattress suits you; a warranty addresses defined defects under its written terms. If you are still within a trial, check the seller’s deadlines and return conditions promptly rather than assuming a warranty claim will extend them. Policies vary by retailer, purchase date and product.
Frequently asked questions
Does a mattress have to sag to qualify for a warranty?
Not always. Some warranties also list other defects, such as certain material splits or manufacturing flaws. The written warranty and inspection determine whether a particular issue qualifies.
Can a mattress feel unsupportive without a visible dip?
Yes. Comfort materials can soften or feel unsuitable without an unweighted indentation that meets a warranty threshold. Check the foundation and consider whether a trial or a comfort adjustment is available.
What to do next
Use our sag-measurement guide, then follow our warranty claim checklist. For brand thresholds, see the Yawnder warranty guide.