Tatami Mattress
A couple relaxing together on a cream mattress in a sunlit bedroom at home

Data-led sleep research

The Ultimate Mattress Research Hub

Built on test checklists and ergonomics—match a sleep setup to your body, room, and how you actually lie down.

Featured guides

New research landings—start here if you sleep hot, need a coil-core explainer, or want to clean a mattress without soaking the foam.

  • Care guide

    How to clean a mattress

    Vacuum, blot stains, dry the core—what not to do on memory foam, hybrids, and coils.

    How to clean a mattress

  • Sleep solution

    Best cooling mattress for hot sleepers

    Why pocket-coil and latex builds usually beat gel foam—construction first, not a brand ranking.

    Open cooling guide

  • Construction

    What is a coil mattress

    Pocket vs Bonnell springs, coil count and gauge, and how a hybrid still counts as a coil bed.

    Open coil guide

Mattress Finder

We save these filters on this device so comparison tables can highlight the rows that match—lumbar, heat, or collapsing edges.

Taxonomy hub

Structured entries for crawlers and shoppers—each card is one construction or sleep-problem silo, two clicks from this homepage.

Dynamic comparison engine

Preview the matrix, then open the full table or posture guide. Scores are editorial indices (1–10), not a single lab machine on every model.

Construction table

Hybrid vs. memory foam: which sleeps cooler?

Firmness index
Foam 4–6 / Hybrid 5–7
Airflow
Coils typically vent more
Bounce / reset
Hybrid resets faster
Open full comparison →

Posture analysis

Tatami floor setup vs. traditional firm mattress

Firmness index
Floor loft 5–10 cm
Airflow
Rush mat + thin pad
Bounce / reset
Sit-up easier if not deep foam
Open full comparison →

Feel & response

Latex vs. memory foam on a low profile

Firmness index
Latex more buoyant
Airflow
Open-cell latex often cooler
Bounce / reset
Latex wins sit-up
Open full comparison →

How we score sleep systems

We do not run a 100-hour sensor lab on every retail SKU. Indices below summarize how we weight trial checklists, layer geometry, and published specs when brands disclose them.

Pressure reliefTemperatureMotion isolationDurabilityEdge sit

  • Memory foam

    Pressure relief 9 · Temperature 4 · Motion isolation 9 · Durability 6 · Edge sit 4

  • Hybrid

    Pressure relief 7 · Temperature 8 · Motion isolation 6 · Durability 8 · Edge sit 8

  • Tatami stack

    Pressure relief 6 · Temperature 7 · Motion isolation 5 · Durability 5 · Edge sit 3

  • Pressure mapping

    Side and back positions on trial checklists—hip/shoulder sink, not marketing ILD alone.

  • Heat observation

    Twenty-minute heat note plus cover and coil-gap reading; we do not own a lab thermal camera on every SKU.

  • Edge & sag

    Sit-the-edge test and warranty indentation language (often 1–1.5 in) as a durability proxy.

  • Floor loft

    Tatami thickness in centimeters versus boxed 10–14 in hybrids—different product, different ruler.

Education & research library

Long-form notes that sit under the hub—ILD-style support reading, floor systems, and trial-period pitfalls.

Frequently asked questions

What is the Mattress Research Hub?
The homepage is a research desk—not a product shelf. Use the finder to filter by pain point and construction, then open comparison tables, tatami guides, and scenario reviews. We do not sell mattresses.
What is Tatami Mattress?
Tatami Mattress is an independent editorial site for tatami mattress sizing, floor sleeping, and tatami mat reviews. We publish guides, scenario reviews, tools, and Best mattresses articles—you build a trial checklist before you buy. We do not sell beds.
What is a tatami mattress?
A tatami mattress is the sleep layer on a low-profile or floor setup—usually thinner than a boxed hybrid. Read our tatami mattress guide for loft ranges, then use the calculator for room footprint.
What is a tatami mat?
A tatami mat is the rush (or synthetic) floor module under the bedding—not the mattress itself. Read our tatami mat guide for materials, thickness, care, and red flags before you order.
How should I use this site if I am new to mattress shopping?
Start with the homepage finder (pain point + construction), open the matching guide or comparison table, then finish with the calculator for room size and firmness. Trial mattresses when you can.
What is the difference between Guides and Reviews?
Guides explain mattress types and how they are built—useful for everyone. Reviews focus on a shopping scenario (firmness by position, cooling, motion transfer) with checklists you can use on specific models. Use guides to choose a category; use reviews to test smarter within that category.
Does Tatami Mattress sell mattresses?
No. We do not take orders or affiliate commissions as a store. Always confirm price, trial length, and return rules on the retailer or brand you choose.
Is this medical advice?
No. Content is for general shopping education. Talk to a clinician if you have persistent pain, numbness, or a sleep disorder.
What is the mattress calculator for?
It has two parts: a room-to-mattress visualizer (Twin, Queen, King, Tatami footprints in your bedroom) and a firmness & thickness estimator from height, weight, sleep position, and optional back pain. Use it to filter choices before you order.
What is the Best mattresses section?
Best mattresses is our hub for longer articles and keyword-focused guides (for example side sleepers, comparisons, and roundups). URLs use your topic plus a unique id so we can publish related articles without clashes.
Memory foam or hybrid—which is better?
Neither wins for everyone. Memory foam usually excels at pressure relief and motion isolation but can sleep warmer. Hybrids add coil airflow and easier movement with a bit less “hug.” Use our side-by-side table and your heat/position priorities to decide.
How do brand firmness scales (soft, medium, firm) compare?
There is no industry-standard test consumers can compare across brands. Treat firmness labels as a rough band, then use our firmness review and calculator as a filter—and always judge morning comfort on a home trial.
When is a mattress topper enough vs replacing the bed?
A topper helps when the core is even and supportive but the comfort layer feels too firm. Replace the mattress if you have deep impressions, hammocking, or broken edge support. Our side sleeper topper guide walks through the decision.
How often is content updated?
We revise guides and reviews when construction trends or trial policies change materially. Check the date on each article; confirm current specs and return windows with the seller before you buy.
Can I suggest a topic or report an error?
We expand Best mattresses and core guides over time based on common shopper questions. For factual corrections on a specific page, use the site’s contact path if listed, or note the article URL when you reach out through official channels.