Start with evidence
Construction, policies, independent findings, owner patterns, and missing evidence kept separate, so you can make a more informed choice.
Our goal is simple: surface the evidence so you can choose with confidence.
Breathable GOTS-certified organic cotton cover quilted with plush batting for initial tactile cushioning and thermal dissipation.
Inherent cellulose-derived flame barrier meeting 16 CFR Part 1633 standards without brominated chemicals or glass fibers.
Thermoregulating open-cell memory foam engineered to redistribute capillary interface pressure away from shoulders and trochanter.
Responsive pin-core aerated latex providing buoyant pushback to prevent deep spinal sag while facilitating vertical airflow.
Individually wrapped carbon-steel coils arranged in ergonomic tension zones: resilient 14.5 AWG in lumbar, contouring 15.5 AWG under shoulders.
Firm high-density foundation slab providing an unyielding baseline for the pocket spring assembly and preventing base deformation.
Evidence-backed starting points
Derived from documented evidence — not testing we never did. Every card links to the full research page with its sources, gaps, and review date.
The most fully documented mattress in the library: law-label specs, policy terms, and independent findings, with gaps stated.
Open the research →Strongest trial terms, documentedTrial, return, and warranty clauses verified against the merchant's own legal pages — including the fees most buyers miss.
Open the research →Widest documented lineupTwenty-plus named configurations, each with its own evidence page — so you compare the exact model, not a brand promise.
Open the research →Zoned Biomechanics (Hooke's Law): Differential wire gauges isolate body mass zones. While plush 16.0 AWG coils allow deep shoulder contouring (28mm), reinforced 14.5 AWG lumbar springs resist pelvic rotation under heavy loads, arresting sag at 30mm to maintain neutral lordotic alignment (Δy ≈ 0).
Individually wrapped pocket coils contour independently to anatomical curves under body mass loads. Differential wire gauges (14.5 AWG lumbar vs 16.0 AWG shoulder) deliver localized support following Hooke's law (F = kΔx) while eliminating lateral disturbance propagation.
Beyond the surface
Every layer has a purpose. Understanding how the materials work together helps explain what public evidence can support and where it remains incomplete.
Non-brand guides
Plain-language guides on construction, positions, and materials — every claim linked to its source.