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 →
Start here — one mattress per firmness band
Every brand calls something 'medium', and they don't mean the same thing by it. This site sorts by band instead, so you can compare across makers. These are the lead picks in each. Each links to a live Amazon search rather than a fixed listing.
Saatva Classic Plush Soft
Innerspring hybrid, self-reported 'Soft' (~4/10 house scale), euro pillow-top comfort layer, dual coil support core
One of the few soft-tier mattresses that still uses a full coil support core, so it stays soft on top without losing edge support or airflow.
Best for: Lighter-weight side sleepers who want pressure relief at the shoulder/hip without an all-foam feel
Watch out: Saatva's own firmness numbers are a HOUSE scale, not an industry standard — its 'Soft (4)' will not feel identical to another brand's '4'. ILD for the pillow-top layer is not publicly disclosed.
Check price on AmazonNot deciding today? Add it to your cart over there — Amazon keeps it saved (and flags any price change) until you're ready.
Brooklyn Bedding Signature Hybrid
Hybrid (foam comfort layers + pocketed coil core), self-reported 'Medium' tier of a Soft/Medium/Firm lineup, manufacturer-published layer ILDs (quilt ~13, TitanFlex ~18, transition ~28)
Publishes ILD numbers for multiple internal layers, not just a single headline figure — the most transparent spec sheet in this dataset.
Best for: Combination sleepers (back/side) wanting a documented middle-of-the-road feel with real coil support
Watch out: Even with published ILD, Brooklyn Bedding's own firmness label ('Medium') is still self-assigned — always cross-check the ILD numbers themselves, not just the word.
Check price on AmazonNot deciding today? Add it to your cart over there — Amazon keeps it saved (and flags any price change) until you're ready.
Saatva Classic Firm
Innerspring hybrid, self-reported 'Firm' (~8/10 house scale), thinner comfort layer over a dual coil support core
Keeps a traditional coil-on-coil support system rather than switching to all-foam at the firm end, which some stomach/back sleepers prefer for a 'sleeping on top of' feel.
Best for: Stomach and back sleepers, and heavier-body-weight sleepers who compress a softer mattress too far
Watch out: Same house-scale caveat as its Soft sibling — Saatva's '8' is not directly comparable to another brand's '8', and no ILD figure is published for the comfort layer.
Check price on AmazonNot deciding today? Add it to your cart over there — Amazon keeps it saved (and flags any price change) until you're ready.
Purple Original Purple Mattress
Proprietary hyper-elastic polymer grid (not foam) over a support-foam core, self-reported 'Medium-Firm', 2 in grid comfort layer, no published ILD (grid isn't rated on the foam ILD scale)
The grid buckles under pressure points (hips/shoulders) while staying firmer under lighter-loaded areas, which behaves differently from a uniform-ILD foam layer.
Best for: Back and stomach sleepers, or combination sleepers who want targeted pressure relief without a deep foam sink
Watch out: Because the comfort layer isn't foam, ILD simply doesn't apply to it — any 'ILD equivalent' you see quoted online is an estimate, not a manufacturer figure, and the grid can feel firmer at first touch than the 'medium-firm' label suggests.
Check price on AmazonNot deciding today? Add it to your cart over there — Amazon keeps it saved (and flags any price change) until you're ready.
Answers to the questions buyers actually ask
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 →