Mattress Warranty
The brand's coverage period for manufacturing defects and excessive sagging, typically 10 years to lifetime. Covers structural defects but not normal comfort changes.
Mattress warranties cover manufacturing defects (broken coils, foam delamination, cover seam failure) and 'excessive' body impressions — typically defined as permanent sagging over 1.0" to 1.5" deep, depending on brand. Warranties do NOT cover normal softening, comfort changes, or stains.
Warranty terms vary widely: standard mattresses offer 10 years (Casper, Purple), premium brands offer 15–25 years (WinkBed lifetime, Avocado 25-year, Saatva lifetime), and value brands often offer Forever Warranty (Nectar, DreamCloud) with reduced coverage scope after year 10.
Body impression thresholds matter more than warranty length. A 25-year warranty that requires 1.5" sag for coverage is functionally similar to a 10-year warranty requiring 1.0" sag — most mattresses develop 0.5–0.75" impressions naturally without qualifying for warranty replacement.
Warranties are non-transferable in nearly all cases. If you buy a used mattress (Craigslist, Facebook Marketplace, secondhand) you have no warranty coverage. If you sell your home with the mattress included, the new owners are not covered.
Mattress warranties cover manufacturing defects — a body impression exceeding a stated depth, coil failure, seam separation — and never comfort preference. The depth threshold is the clause that matters: 1 inch is a strong warranty, 1.5 inches is common, and anything at 2 inches is nearly impossible to claim before the mattress is unusable anyway.
Two conditions void more claims than any defect: staining, and inadequate support. Use a waterproof protector from day one and confirm the required foundation type and center-support spacing before you set the bed up. Keep the law tag and your receipt; most brands will refuse a claim without both.
What This Means for Shoppers
Read the warranty's body-impression threshold (the 'sag depth required for replacement') — that's the spec that matters, not the headline year count. A 1.0" threshold is consumer-friendly; 1.5" is industry-typical; 2.0" thresholds are restrictive.