Source summary
Identity reference · not a product scoreWhat the reviewed records support
- Parent family
- Zenhaven
- Record type
- Mattress side
- Profile
- 10 inches
- Published comfort or side label
- Gentle Firm side
- Source status
- Current on brand site
- Numeric firmness
- Not independently verified
Upper-Flex is a size and adjustable-base configuration within the underlying mattress family, not a separate comfort model.
Open the parent mattress-family record →Full research page availableMaterials, layers, certifications, policies, measurements, and unresolved gaps
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Identity details
Names used in the reviewed sources
- Name shown on this page
- Zenhaven Upper-Flex King · Gentle Firm side · 10"
- Name shown in the source
- Zenhaven Upper-Flex King · Gentle Firm side · 10"
- Name verification
- Documented in the reviewed sources
- Reference type
- Mattress side
- Parent family
- Zenhaven
- Firmness / mattress side
- Gentle Firm side
- Profile height
- 10 inches
- Bed sizes documented
- Upper-Flex King
- Catalog or historical status
- Current on brand site
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Evidence boundary
What the reviewed records do and do not establish
Documented here
Source name and reference type
Published or historically referenced comfort wording
Referenced profile height
Reported sizes and catalog context
Not established unless stated
A distinct construction or SKU
Complete layer-by-layer specification
Configuration-specific chemicals or certifications
Independent performance or durability
Firsthand comfort findings
This page tracks a configuration, mattress side, retailer listing, or historical-name/specification row. It is not necessarily a distinct SKU or an exact marketed product title.
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Sources