Mattress Firmness, Decoded
Every mattress brand assigns its own firmness number — a "6" from one brand is not a "6" from another. The objective measure behind firmness is ILD (Indentation Load Deflection), the force needed to compress a standard foam sample 25% — but almost no brand publishes it. Mattress Firmness Picks organizes guides by real firmness band, names the construction type and comfort-layer thickness that change how a given firmness actually feels, and tracks which brands disclose ILD in our Firmness Translation Index dataset. We don't publish prices or star ratings, every pick names an honest drawback, and we never make health or medical claims.
Most "best mattress" lists repeat a brand's own 1-10 firmness label as if it were a lab measurement. It isn't — there's no accredited body standardizing that scale across brands. Pick a firmness band below, or start with the sleep-position guides if you're not sure which band fits you.
Soft & Plush Mattresses
Self-reported 'soft' spans a wide real range — here's what's actually disclosed about each comfort layer, and what isn't.
3 picks →
Medium & Medium-Firm Mattresses
The most popular band for combination sleepers — and the one where brand firmness labels vary the most from each other.
6 picks →
Firm Mattresses
For stomach/back sleepers and heavier body weights — the two mattresses here with an actual published ILD number, plus honest budget options.
3 picks →
The claims worth decoding first
How we work
We're a research-based site: we read manufacturer spec sheets and public product pages, cross-check third-party mattress-review aggregators where a brand doesn't disclose a figure directly, and report the construction and disclosure facts plainly — including when a brand does NOT publish an ILD number. We always name a downside, never publish exact prices or star ratings, and report support/pressure-distribution equipment facts only — never a claim that any mattress treats, prevents, or relieves back pain or any medical condition. Read our full methodology →