At a glance
What this mattress is
- Brand
- Helix
- Collection
- Core
- Marketed for
- Back and stomach sleepers; plush family
- Research scope
- U.S. market · checked 3 August 2026
- Price observation
- Live merchant priceHelix prices change by tier, size, and optional cooling or lumbar upgrades. Verify the current configured total.
Available options
Firmness, height, and size choices
- Profile
- 11.5 inches
- Available sizes
- Twin; Twin XL; Full; Queen; King; California King; Short Queen; RV King
Current option offered under this mattress name. ErgoAlign is an optional zoned ultra-dense foam layer selected with the mattress, not a loose accessory; it materially changes the finished internal build while retaining the 11.5-inch profile.
- Profile
- 11.5 inches
- Available sizes
- Twin; Twin XL; Full; Queen; King; California King; Short Queen; RV King
Current option offered under this mattress name. Keep the 11.5-inch record, but replace the note claiming the GlacioTex finished height is unpublished. Current support identifies the optional pillow top as 1 inch, creating the separately cataloged 12.5-inch configuration.
- Profile
- 12.5 inches
- Available sizes
- Twin; Twin XL; Full; Queen; King; California King; Short Queen; RV King
Current option offered under this mattress name. Helix says the factory-sewn GlacioTex pillow top is offered on all seven Core Collection mattresses. The current option adds 1 inch to the standard 11.5-inch Moonlight, yielding a distinct 12.5-inch construction.
- Profile
- 12.5 inches
- Available sizes
- Twin; Twin XL; Full; Queen; King; California King; Short Queen; RV King
Current option offered under this mattress name. This checkout combination contains both the sewn-in 1-inch GlacioTex pillow top and the material-changing ErgoAlign foam layer; it is distinct from the standard-support 12.5-inch configuration.
Why these options share one page: They are sold under the same marketed mattress name. Firmness, height, and size choices stay together here, and any documented construction differences are explained beside the relevant option. A different marketed mattress name always receives its own page.
Exact mattress pages
Configurations and documented generations
Construction record
Named components; order not confirmed
- •
Breathable knit cover; GlacioTex pillow-top upgrade is optional
- •
Family-specific comfort foams
- •
Pocketed coil support with reinforced perimeter
- •
DuraDense base foam
Brand documents name these components but do not establish one unambiguous top-to-bottom order.
Documented
Useful disclosures
- Soft 2–3 published comfort range
- 11.5 in published overall height
- Named Core construction architecture
- Trial and warranty terms available as separate documents
Unresolved
Evidence gaps
- Complete numeric foam densities are not published
- Exact coil counts and gauges are not consolidated by size
- Optional upgrades create multiple builds under the same model name
- Sleep-position fit is a brand recommendation, not independently validated here
Version history
Earlier options and documented generations
Earlier documented generations
Older profiles remain visible when height, materials, or construction may differ.
Historical generation
Helix Moonlight Core — Soft — 10"
- Feel
- Soft (2–3/10 current; 3.5/10 documented in 2021)
- Profile
- 10 inches
- Status
- Retired generation
Historical generation
Helix Moonlight Core — Soft — 12"
- Feel
- Soft (2–3/10 current; 3.5/10 documented in 2021)
- Profile
- 12 inches
- Status
- Retired generation
Historical generation
Helix Moonlight Core — Soft — 11.5"
- Feel
- Soft (2–3/10 current; 3.5/10 documented in 2021)
- Profile
- 11.5 inches
- Status
- Retired generation
Historical generation
Helix Moonlight Core — Soft — 13.5" — GlacioTex Cooling Pillow Top (historical generation)
- Feel
- Soft
- Profile
- 13.5 inches
- Status
- Retired factory-sewn checkout configuration
Purchase contract
Trial, return, warranty, and delivery
- Trial
- 120 nights with a 30-night minimum for eligible mattress returns.
- Return / exchange
- Eligible direct purchases can be returned without a pickup fee. The terms set process deadlines and exclusions.
- Warranty
- Lifetime limited warranty for mattresses bought on or after 1 February 2025, with no-charge defect remedies in years 1–10 and prorated charges afterward.
- Delivery
- Compressed parcel delivery. Optional in-home setup may be available separately by location.
This is a readable summary, not the full contract. Open the policy sources below and save the version in effect when you order.
Sources
Open the underlying documents
- 01Helix Moonlight product pageHelix Sleep · Product · access date not separately recorded
- 02Helix sleep trialHelix Sleep · Policy · access date not separately recorded
- 03Helix mattress warrantyHelix Sleep · Warranty · access date not separately recorded
- 04Helix termsHelix Sleep · Policy · access date not separately recorded