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Analysis
Analysis
Analysis
Why firmness ratings never agree
We compared published firmness ratings for six mattresses across eight review sites. The spread was up to three points on the same bed.
2 min read
Journal
Notes from the test bedroom — page 2
Measurement write-ups, methodology changes, price tracking and the occasional argument about what a firmness number actually means.
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Data
Data
Data
Five years of sag data, and what it says about durability claims
Annual sag measurements on every mattress we have kept since 2021. Which constructions hold up, which do not, and how much sleeper weight matters.
3 min read
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Methodology
Methodology
Methodology
What we changed in the 2026 rubric
We reweighted durability, added a ten-minute edge creep measurement, and stopped scoring cooling covers separately. Here is why, and what it moved.
2 min read
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