Historical reference page. This page preserves a historical or alternate mattress identity. Details that could not be matched to one exact version are stated as unresolved.
Bottom line
Older 6 inches Saatva Bunk & Trundle; current materials and policies may not apply.
What the research suggests
- Reported
- Results vary
- Not enough public information
The reviewed sources do not provide a clear position finding for this mattress.
The reviewed sources do not provide a clear body-weight finding for this mattress.
The reviewed sources do not provide a clear cooling finding for this mattress.
The reviewed sources do not provide a clear motion isolation finding for this mattress.
The help article lists 13-gauge coils: 198 Twin, 216 Twin XL, and 286 Full, with a 300-pound limit.
A label is not an independent whole-mattress measurement.
Skip if: Prefer deep contouring memory foam hug with zero motion transfer?
Shoppers who must remain below a bunk guardrail or within trundle clearance.
Families comparing the current 7-inch model with the earlier 6-inch specification.
The frame maker's clearance and guardrail instructions control safe fit.
Official 6-inch help material conflicts with the current 7-inch product page.
No independent configuration-matched performance test was located.
The reviewed sources name 2 components for Saatva Bunk & Trundle Mattress · Medium-Firm · 6", but do not support one reliable top-to-bottom sequence. No cut-open layer stack is shown because that would imply evidence we do not have.
Editorial Guardrail: Sequence Unverified
Published components, order unconfirmed. Do not read as a layer stack.
Layer order not verified. This is not a teardown or physical inspection by Nappedia. The reviewed manufacturer sources document 2 components for Saatva Bunk & Trundle Mattress · Medium-Firm · 6", but do not establish an authenticated top-to-bottom strata sequence. Vertical stack rendering is suppressed to prevent unverified consumer guidance.
Documented Components (2) · Unordered Specifications
Order UnconfirmedSix-inch documented build
Establishes an official historical specification, but not that a separate six-inch SKU was manufactured or sold concurrently with the current seven-inch model.
Historical coil unit
These figures belong only to the six-inch documentation and are not copied to the current seven-inch page.
This page covers the exact database record “Saatva Bunk & Trundle Mattress · Medium-Firm · 6".” Earlier official materials described this mattress as 6 inches and Medium-Firm. The current product is 7 inches and Medium; the transition date and whether construction changed were not verified. Current-family specifications and performance are not silently transferred to this historical or retailer record. Nappedia has not slept on, opened, or laboratory-tested this mattress.
Editorial synthesis
Evidence behind the conclusion
Older 6 inches Saatva Bunk & Trundle; current materials and policies may not apply.
Saatva Bunk & Trundle Mattress · Medium-Firm · 6" is documented as specialty mattress with a medium-firm feel and 6 inches profile. The page uses the current or historical documents listed below. Independent findings appear only when the tested version is identified; missing results are marked as unknown.
Who the cited evidence may support
These are research signals, not a comfort guarantee.
- Shoppers who must remain below a bunk guardrail or within trundle clearance.
- Families comparing the current 7-inch model with the earlier 6-inch specification.
What to check before choosing
These limitations may change whether the mattress fits.
- The frame maker's clearance and guardrail instructions control safe fit.
- Official 6-inch help material conflicts with the current 7-inch product page.
- No independent configuration-matched performance test was located.
- Verify the exact Medium-Firm / 6 inches configuration before relying on family-level findings.
Moderate confidence in the historical label or specification reference; low confidence in exact dates and production-year composition where preserved primary documents are incomplete.
Identity and core facts
At a glance
Named components
Published component map
The official page names these components but does not render one reliable top-to-bottom sequence. They are not numbered as a confirmed stack. This is not our teardown or independent verification of composition.
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Chemicals and claims
Materials & certifications
CertiPUR-US
Brand states qualifying foams are certified2GREENGUARD Gold
Listed on the current 7-inch product page2
Fiberglass
Brand says none2Generation-specific composition
Not fully reconciled between the 6- and 7-inch documents2Exact-record certificate documents
Not linked unless specifically stated aboveCertification names do not establish scope for every component, generation, retailer SKU, or production lot.
1, 2Representative editorial textures for orientation only. Nappedia did not inspect a physical material sample.
Uniform Law Label & Material Deconstruction
Under FTC 16 CFR Part 303 and IABFLO uniform law label standards, bedding manufacturers must disclose exact net filling weights using standardized generic fiber terms. Marketing buzzwords are prohibited under federal penalty.
UNDER PENALTY OF LAW THIS TAG NOT TO BE REMOVED EXCEPT BY THE CONSUMER
ALL NEW MATERIAL CONSISTING OF
Certification is made by the manufacturer that the materials in this article are described in accordance with law.
Brand scale vs measured samples
Firmness evidence
Published label
Medium-Firm; 6 inches.
Manufacturer, retailer, or historical-source wording; not an independent measurement.1, 2Nappedia interpretation
Treat Medium-Firm as a seller label whose real-world feel can vary by body weight, sleep position, production generation, and test method.
Document synthesis only; no physical test by Nappedia.1, 2Biomechanical Metrology & Microvascular Hemodynamics
Landis Capillary Threshold: 32.0 mmHg (4.266 kPa)Interactive Pressure Mapping & Sleep Posture Heatmap
Direct clinical simulation of contact interface pressures, capillary perfusion collapse, and coronal/sagittal spinal curvature across sleeper mass tiers and mattress firmness ratings.
Shoulder and hip immersion maintain level coronal spinal neutrality parallel to the mattress.
Clinical Perfusion Assessment (Landis 1930): ELEVATED LOAD WARNING: Interface pressure at Hips & Pelvis (28.2 mmHg) approaches the 32.0 mmHg ischemic closing boundary. Microvascular vascular resistance is elevated; increased contouring is advised to prevent localized tissue hypoxia during prolonged lateral sleep cycles.
Warning pressure zone (28.2 mmHg). Elevated microvascular resistance; monitoring recommended.
Anatomical Sensor Matrix (6 Discrete Interface Zones)
| Anatomical Sensor Zone | Pressure (mmHg) | Pressure (kPa) | Microvascular Status | Clinical Evaluation |
|---|---|---|---|---|
| Head & CervicalOcciput and C1-C7 cervical vertebrae resting on sleep surface/pillow interface | 11.8 mmHg | 1.57 kPa | optimal | Cervical spine neutral. |
| Shoulders & ThoracicGlenohumeral joint, acromion process, scapulae, and T1-T12 thoracic cage | 27.3 mmHg | 3.64 kPa | warning | Warning pressure zone (27.3 mmHg). Elevated microvascular resistance; monitoring recommended. |
| Lumbar SpineL1-L5 lordotic bridge requiring active upward support to prevent paraspinal spasm | 14.2 mmHg | 1.89 kPa | optimal | Flank and waist properly supported. |
| Hips & PelvisGreater trochanter, iliac crest, and sacrum carrying 40-45% of total sleeper mass | 28.2 mmHg | 3.76 kPa | warning | Warning pressure zone (28.2 mmHg). Elevated microvascular resistance; monitoring recommended. |
| Knees & ThighsMedial/lateral femoral condyles and patellar articulation | 14.8 mmHg | 1.97 kPa | optimal | Lateral knee contact comfortable. |
| Feet & AnklesLateral malleolus and calcaneus heel bone interface | 10.8 mmHg | 1.44 kPa | optimal | Lateral ankle safely supported. |
Method, sample, and source kept attached
Performance evidence matrix
A result describes a particular test method and sample. When reputable reviewers disagree, this file records the disagreement instead of inventing a consensus score.
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).
Simulated Hooke’s law pocket coil deflection across anatomical body load distributions.
Exact-record independent test
Evidence gapNo reputable independent physical test of this exact configuration was located in the reviewed source set.
No exact sample table is shown. A version-matched independent measurement set was not located for this mattress. Related family reviews remain in the sources used without being presented as tests of this mattress.
Exact published measurements
Dimensions & weight
3 documented size rows: Twin, Twin XL, Full.
The contract matters
Trial, return, warranty & delivery
- 01Current sale statusHistorical or retired record
- 02Original trial and return termsNot established from the reviewed historical sources
- 03Original warrantyProduction-year contract not found
- 04Secondhand purchasesCurrent direct-sale protections should not be assumed
- Not found / unresolvedCurrent sale status
- Historical or retired record
No current direct purchase policy is represented for this exact record.
1, 2 - Not found / unresolvedOriginal trial and return terms
- Not established from the reviewed historical sources1, 2
Warranty Proration Cliff & Fine Print Analysis
Mattress warranties advertised as "25-Year" or "Lifetime" typically undergo an actuarial transition into a steep proration cliff after Year 10. Consumer defect claims require rigid straight-edge depth proof and strict foundation compliance.
- Years 1-10: 100% Non-Prorated. The manufacturer covers 100% of replacement or repair costs ($0 customer copay).
- Years 11-15: Customer pays 50% of the purchase price ($900.00 on a $1800 mattress).
- Years 16-20: Customer pays 75% of the purchase price ($1350.00 on a $1800 mattress).
- Years 21-25: Customer pays 85% of the purchase price ($1530.00 on a $1800 mattress).
- Round-Trip Freight Surcharge: Optional repair in Year 3+ incurs a mandatory $149 processing fee.
Do not mix generations
Previous names & version history
- Located source recordOfficial
Saatva Bunk & Trundle Mattress · Medium-Firm · 6" appears in the reviewed source set.
Historical documentation; whether a distinct 6-inch production version existed is unresolved. Earlier official materials described this mattress as 6 inches and Medium-Firm. The current product is 7 inches and Medium; the transition date and whether construction changed were not verified.
1 - Corroborating recordAnalysis
A second source was reviewed for Saatva Bunk & Trundle.
It is used for context and conflict checking; it does not automatically prove a distinct SKU or identical construction.
2 - 31 Jul 2026 evidence freeze
Questions found during research
Common questions, answered from the evidence
These themes recur across brand help centers and independent review research: model name, firmness, sizing, construction, base compatibility, materials, and purchase terms. They are not presented as search-volume rankings.
Which exact mattress does this page cover?
This page covers “Saatva Bunk & Trundle Mattress · Medium-Firm · 6".” Its documented status is Historical documentation; whether a distinct 6-inch production version existed is unresolved, and the published options are “Medium-Firm · 6 inches · Historical documentation; whether a distinct 6-inch production version existed is unresolved.” Findings from another height, firmness, retailer version, or generation are not automatically treated as equivalent. 1
What firmness is documented for this mattress?
Medium-Firm; 6 inches. Manufacturer, retailer, or historical-source wording; not an independent measurement. 1, 2
How tall is this mattress, and which sizes were documented?
The published profile for this mattress is 6 inches. Documented sizes: Twin, Twin XL, Full. 1, 2
What is inside this mattress?
Reviewed sources name Six-inch documented build, Historical coil unit, but one reliable top-to-bottom order was not verified. 1, 2
What did the reviewed sources say about fiberglass or the flame barrier?
Brand says none 2
What trial, return, or exchange terms apply to this mattress?
Original trial and return terms: Not established from the reviewed historical sources 1, 2
Which important details are still unverified?
Exact identity and construction boundary: Not fully established Earlier official materials described this mattress as 6 inches and Medium-Firm. The current product is 7 inches and Medium; the transition date and whether construction changed were not verified. Proof that a six-inch production version was manufactured or sold: Not found or not configuration-specific in the reviewed public sources Exact change date to the seven-inch live page: Not found or not configuration-specific in the reviewed public sources 1, 2
The blank spaces are data
What is missing
“Not found” means the fact was not located in the reviewed public sources as of the page review date. It does not prove the feature or material is absent.
- Exact identity and construction boundary
- Not fully established
Earlier official materials described this mattress as 6 inches and Medium-Firm. The current product is 7 inches and Medium; the transition date and whether construction changed were not verified.
1, 2 - Proof that a six-inch production version was manufactured or sold
- Not found or not configuration-specific in the reviewed public sources1, 2
- Exact change date to the seven-inch live page
- Not found or not configuration-specific in the reviewed public sources1, 2
- Whether the internal construction changed
- Not found or not configuration-specific in the reviewed public sources1, 2
- Reason for the 300-to-250-pound limit difference
- Not found or not configuration-specific in the reviewed public sources1, 2
Open every underlying document
Sources used
Official pages establish what the seller publishes. Independent sources are used for observed performance, measurements, teardowns, and version checks. Neither source class is treated as infallible. No physical test was conducted by Nappedia.
Commercial disclosure: Nappedia has an affiliate relationship with Saatva. The product link on this page is currently an ordinary, untracked link.
- 1
Saatva · Primary or earliest located record
First located record for Saatva Bunk & Trundle Mattress · Medium-Firm · 6" ↗Reviewed 31 Jul 2026 - 2
Saatva Customer Help Center · Corroborating specification, history, or context
Corroborating or context record for Saatva Bunk & Trundle ↗Reviewed 31 Jul 2026 - 3
Saatva · Current direct-sale policy; applicability labeled in the dossier
Home trial, returns and exchanges ↗Reviewed 31 Jul 2026 - 4
Saatva · Current direct-sale warranty; applicability labeled in the dossier
Saatva mattress lifetime warranty ↗Reviewed 31 Jul 2026 - 5
Saatva · Current direct-sale delivery policy
Free white-glove mattress delivery ↗Reviewed 31 Jul 2026