# Mattress Firmness Picks — Full Fact Digest

Site: Mattress Firmness Picks. Research-based, spec-first mattress guides. No prices, no star ratings, every pick names an honest drawback, no health/medical claims. Amazon Associate — links are tagged SEARCH urls only, never ASIN, rel="nofollow sponsored noopener".

## Homepage
Canonical: https://mattress-firmness-picks.pages.dev/
Mattress firmness is self-reported per-brand with no industry standard. ILD (Indentation Load Deflection) is the objective measure, rarely disclosed. Site organizes guides by firmness band (soft/medium-firm/firm) and tracks ILD disclosure in the Firmness Translation Index.

## Key Facts
Canonical: https://mattress-firmness-picks.pages.dev/key-facts/
Maintained reference covering: ILD definition and test method, why self-reported firmness isn't standardized, why most brands don't disclose ILD, body-weight effects on perceived firmness, construction differences (memory foam/latex/hybrid), sleep-position fit, and the no-health-claims policy.

## The Firmness Translation Index (dataset)
Canonical: https://mattress-firmness-picks.pages.dev/firmness-translation-index/
Named dataset, version 1.0, CC BY 4.0 license, published/updated 2026-07-30. 13 mattress models from 10 brands (Saatva, Brooklyn Bedding, Nectar, Purple, Casper, DreamCloud, Tempur-Pedic, Avocado, Zinus). Columns: brand, model, self-reported firmness + scale, comfort-layer ILD + disclosed flag, support-core ILD + disclosed flag, construction type, comfort-layer thickness, best-fit sleep position, source, source_class (manufacturer spec sheet / retailer listing / derived). Only Brooklyn Bedding (3 products: Signature Hybrid, Plank Firm, 3in Latex Topper) publishes ILD; all others show "Not disclosed." CSV: /firmness-translation-index.csv and versioned /firmness-translation-index-v1.0.csv.

## Best Soft Mattress
Canonical: https://mattress-firmness-picks.pages.dev/best-soft-mattress/
Soft-tier picks: Saatva Classic Plush Soft (innerspring hybrid, self-reported Soft ~4/10, ILD not disclosed), Brooklyn Bedding 3in Latex Topper Soft (natural Talalay latex, ILD 19, disclosed), Nectar Original (all memory foam, self-reported Medium Firm ~6/10, ILD not disclosed).

## Best Medium-Firm Mattress
Canonical: https://mattress-firmness-picks.pages.dev/best-medium-firm-mattress/
Medium-tier picks: Brooklyn Bedding Signature Hybrid (hybrid, ILD disclosed: comfort layer ~18, transition ~28), Purple Original (polymer grid, not foam, ILD not applicable), DreamCloud Premier Rest (hybrid, self-reported ~6.5/10, ILD not disclosed), Casper Original (all-foam zoned, self-reported ~6-7/10, ILD not disclosed), Tempur-Pedic TEMPUR-Adapt Medium (proprietary material, ILD not applicable), Avocado Green Mattress (latex hybrid, self-reported ~6-7/10, ILD not disclosed).

## Best Firm Mattress
Canonical: https://mattress-firmness-picks.pages.dev/best-firm-mattress/
Firm-tier picks: Saatva Classic Firm (innerspring hybrid, self-reported ~8/10, ILD not disclosed), Brooklyn Bedding Plank Firm (all-foam flippable, ILD disclosed: comfort ~28, core ~36), Zinus 12in Green Tea Memory Foam (all memory foam, self-reported Medium Firm-Firm, ILD not disclosed).

## What Does Mattress Firmness "7" Actually Mean?
Canonical: https://mattress-firmness-picks.pages.dev/what-does-mattress-firmness-7-actually-mean/
A firmness number is entirely self-assigned by the brand, consistent only within that brand's own lineup, not standardized against competitors. No accredited body audits mattress firmness scales.

## What Is ILD (Indentation Load Deflection)?
Canonical: https://mattress-firmness-picks.pages.dev/what-is-ild-foam-firmness/
ILD = force in pounds to compress a 15"x15"x4" foam sample 25% (1 inch) of its thickness using a 50-square-inch circular indenter. Governing standard: ASTM D3574 for polyurethane foam; latex commonly tested under a related but distinct protocol. Higher ILD = firmer foam. Rarely disclosed by mattress brands.

## What Firmness Is Best for Side Sleepers?
Canonical: https://mattress-firmness-picks.pages.dev/what-firmness-is-best-for-side-sleepers/
Generally soft to medium, for shoulder/hip pressure relief and spinal alignment. Body weight and construction type shift the exact fit. Equipment guidance, not medical advice.

## What Firmness Is Best for Back Sleepers?
Canonical: https://mattress-firmness-picks.pages.dev/what-firmness-is-best-for-back-sleepers/
Generally medium to medium-firm, balancing lower-back cushioning against hip support. Equipment guidance, not medical advice.

## What Firmness Is Best for Stomach Sleepers?
Canonical: https://mattress-firmness-picks.pages.dev/what-firmness-is-best-for-stomach-sleepers/
Generally medium-firm to firm, to prevent the midsection sinking and pulling the lower back out of alignment. Equipment guidance, not medical advice.

## Does Body Weight Change How Firm a Mattress Feels?
Canonical: https://mattress-firmness-picks.pages.dev/does-body-weight-change-mattress-firmness/
Yes. Heavier bodies compress further into a comfort layer of given ILD, making the same mattress feel softer. Informal bands: <130 lb lighter, 130-230 lb average, >230 lb heavier.

## Memory Foam vs Latex vs Hybrid Firmness
Canonical: https://mattress-firmness-picks.pages.dev/memory-foam-vs-latex-vs-hybrid-firmness/
Identical ILD feels different by construction: memory foam = slow/deep sink; latex = fast/buoyant; hybrid coil core = adds support depth beneath the comfort layer. ILD only directly comparable within similar constructions.

## Why Mattress Firmness Scales Aren't Standardized
Canonical: https://mattress-firmness-picks.pages.dev/why-mattress-firmness-scales-arent-standardized/
No industry body standardizes brand firmness scales. ILD is the closest objective measure but is a materials-test figure, not a finished-product certification, and is rarely disclosed.

## How We Evaluate Mattresses
Canonical: https://mattress-firmness-picks.pages.dev/how-we-evaluate/
Research-based firmness/construction analysis: manufacturer spec sheets, disclosed ILD where published, construction type, comfort-layer thickness, aggregated third-party reviewer themes. No hands-on testing, no prices, no star ratings, always a downside, no health claims.

## Questions this site can answer
- What does mattress firmness 7 actually mean?
- What is ILD (Indentation Load Deflection) and how is it tested?
- Which mattress brands publish ILD figures, and which don't?
- What firmness is best for side sleepers? For back sleepers? For stomach sleepers?
- Does body weight change how firm a mattress feels?
- Why do memory foam, latex, and hybrid mattresses feel different at the same ILD?
- Why isn't there a standardized mattress firmness scale across brands?
- What is the Firmness Translation Index and how can I download it?
- Does a firmer or softer mattress treat back pain? (No — we make no medical claims; consult a physician.)