Split Head Summit Hybrid Plush Mattress — 15", CoolStream Fabric, Titanium Memory Foam, Ice Flex Cooling, 7-Series Pocketed Coils | From $1,734.75
MATTRESSES & TOPPERS · MATTRESSES & ACCESSORIES
CoolStream Fabric. High Density Titanium Memory Foam. Ice Flex Cooling Bands. CertiPUR Comfort Layer. 7-Series Individually Pocketed Coils. Foam Encased. The Split Head Summit Hybrid Plush — A 15" Cooling Hybrid in King and Eastern King With Independent Head Adjustability. 20-Year Warranty.
Available in California King · Eastern King only · 15" profile · Plush comfort · Split head design — each side adjusts independently · CoolStream fabric cover · High density titanium memory foam · Ice Flex Cooling Bands · CertiPUR comfort layer · 7-Series individually pocketed coil system · Foam encasement · GreenGuard Gold certified · 20-year warranty · Bed-in-Box · $1,734.75
Quick Answer: The Split Head Summit Hybrid Plush is a 15" California King and Eastern King hybrid mattress with a split head design — the mattress head section is divided down the centre, allowing each partner's head and upper body to be independently positioned via an adjustable base. CoolStream fabric cover, high density titanium memory foam, Ice Flex Cooling Bands, CertiPUR comfort layer, and a 7-Series individually pocketed coil system with foam encasement. GreenGuard Gold certified. 20-year warranty. Bed-in-Box. $1,734.75.
What Is a Split Head Mattress — and Who Is It For?
A split head mattress is divided vertically down the centre at the head section — the top third to half of the mattress is two separate pieces, while the foot section remains a single unified surface. This split allows each side of the mattress to be independently raised or reclined at the head and upper body when used with a compatible split-head adjustable base, without affecting the other partner's position. The foot of the mattress and the lower body support remain shared and continuous, maintaining the feel of sleeping in a shared bed rather than two separate twin mattresses pushed together.
The split head configuration is the solution to one of the most common shared sleep incompatibilities: one partner wants to elevate their head for reading, watching television, or managing acid reflux or snoring, while the other partner prefers to sleep flat. On a standard non-split mattress, raising the head section for one partner disturbs the other. The Split Head Summit Hybrid Plush — used with a compatible split-head adjustable base — allows each partner to independently adjust the elevation of their head and upper body without compromise.
⚠️ Adjustable base required: The split head design requires a compatible split-head adjustable base to utilise independent head elevation. On a standard flat bed frame the mattress functions as a standard California King or Eastern King plush hybrid — the split seam is present but both sides lie flat together. The mattress is sold separately from any adjustable base.
Six-Layer Cooling Hybrid Construction. Every Component Explained.
LAYER 1 — COVER
CoolStream Fabric
CoolStream is an engineered cooling fabric designed to actively dissipate heat from the sleep surface — it conducts warmth away from body contact rather than allowing it to accumulate. For a plush comfort mattress where the sleeper sinks further into the comfort layers and body-to-surface contact is more extensive, an active cooling cover fabric is particularly important. CoolStream addresses the heat retention that is the most common complaint about plush comfort levels by managing temperature at the first point of contact.
LAYER 2 — COMFORT
High Density Titanium Memory Foam
Titanium-infused high density memory foam is a premium comfort material that addresses standard memory foam's primary weakness — heat retention. Titanium particle infusion improves the foam's thermal conductivity, drawing heat away from the body as memory foam contours to it. High density formulation provides durable, long-lasting plush compression that maintains its feel over the mattress's service life rather than softening prematurely. The memory foam's deep body-contouring is the plush comfort's primary pressure relief mechanism — shoulder, hip, and lumbar pressure points compress into the foam for deep, sustained relief.
LAYER 3 — COOLING
Ice Flex Cooling Bands
Ice Flex Cooling Bands run through the comfort layer of the mattress, providing a secondary cooling mechanism that operates deeper within the mattress structure than the cover fabric. The bands flex with the mattress compression cycles and help dissipate accumulated body heat from within the foam layers — addressing the heat that penetrates past the cover fabric and builds up inside the comfort layer during extended sleep periods. The dual cooling approach — CoolStream cover + Ice Flex bands — is designed to manage temperature throughout the full depth of the plush comfort zone.
LAYER 4 — TRANSITION
CertiPUR Comfort Layer
CertiPUR-US certified foam is tested and certified by an independent, nonprofit organisation to confirm it is made without ozone depleters, PBDE flame retardants, mercury, lead, formaldehyde, or phthalates. The CertiPUR comfort layer provides a transition between the memory foam above and the coil system below, adding a graduated firmness that bridges the soft plush surface with the structured coil support core. For a mattress in a bedroom — particularly one in a room with limited ventilation — CertiPUR certification provides independent confirmation that the foam will not off-gas harmful compounds into the sleep environment.
LAYER 5 — SUPPORT
7-Series Individually Pocketed Coil System + Foam Encasement
The 7-Series individually pocketed coil system provides the structural foundation of the Summit Hybrid Plush — each coil encased in its own fabric pocket, compressing and rebounding independently of neighbouring coils. Independent coil response is the critical feature for a split head shared mattress: movement on one side is absorbed by that side's coils without transmitting force laterally to the other side. Foam encasement surrounds the coil perimeter on all four sides, reinforcing the mattress edge against roll-off and maintaining a stable, usable sleep surface from edge to edge — important on a California King or Eastern King where the mattress perimeter represents a significant proportion of the sleep surface.
CERTIFICATION
GreenGuard Gold Certified
GreenGuard Gold is UL's most rigorous indoor air quality certification — testing for over 10,000 volatile organic compounds with strict limits specifically for products used in sleeping environments. For a mattress at the $1,734.75 price point, GreenGuard Gold certification provides independent confirmation that no harmful chemical emissions enter the bedroom from the mattress during sleep. This is particularly meaningful for a plush mattress where the sleeper is in sustained close contact with the comfort layers throughout the night.
Split Head vs Standard King — Key Differences.
| Feature | Split Head — This Mattress ✅ | Standard King / Eastern King |
|---|---|---|
| Head section | Split — two independent halves | Unified — single piece |
| Foot section | Unified — single continuous surface | Unified |
| Independent head elevation | ✅ Yes — with compatible adjustable base | ❌ Both sides rise together |
| Bed frame required | Split-head adjustable base (sold separately) | Standard or adjustable platform frame |
| Shared sleeping feel | One shared bed — not two separate mattresses | One shared bed |
| Available sizes | California King · Eastern King only | Twin through Eastern King |
Who Is This Mattress For? 4 Scenarios.
Scenario 1: You and your partner have incompatible head elevation preferences — one sleeps flat, one needs or prefers an elevated head position for reading, television, or health reasons.
This is the defining use case for a split head mattress. Elevating the head section of a standard King mattress raises both sides — the partner who sleeps flat is disturbed whether they want to be or not. On the Split Head Summit Hybrid Plush with a compatible adjustable base, each partner controls their head elevation independently. The sleeper who prefers elevation — for snoring, acid reflux, post-surgical recovery, reading, or simply personal preference — can raise their side without affecting their partner. The shared foot section maintains the feel and functionality of a single shared bed.
Scenario 2: You are a side sleeper who runs warm and needs deep plush pressure relief without the heat retention that most plush memory foam mattresses create.
Plush comfort and heat retention are traditionally correlated — the deeper compression of a plush surface creates more body contact area and traps more heat. The Summit Hybrid Plush addresses this specifically with a dual cooling system: CoolStream fabric at the cover actively dissipates heat at the surface, and Ice Flex Cooling Bands manage temperature within the comfort layer. The titanium-infused high density memory foam adds a third layer of thermal management within the memory foam itself. For a side sleeper who needs plush pressure relief but has previously found plush mattresses too warm, this three-tier cooling architecture is a direct solution.
Scenario 3: You need a California King or Eastern King plush mattress with strong edge support — a mattress that is fully usable across the entire width of a very large bed.
California King (72"×84") and Eastern King (76"×80") are the largest standard mattress sizes — the perimeter of either represents a meaningful proportion of the total sleep surface. Foam encasement on a California King or Eastern King plush mattress is essential: without it, the soft comfort layers at the edges compress readily under any weight near the perimeter, creating an unstable zone that effectively reduces the usable mattress width. The Summit Hybrid Plush's foam encasement reinforces the full perimeter, making the edge as supportive as the centre — the full 72" or 76" width is genuinely usable sleep surface.
Scenario 4: You want a GreenGuard Gold certified mattress at plush comfort — confirmed clean indoor air quality in the bedroom environment through the full night of sustained plush contact.
A plush mattress involves deeper body immersion into the comfort layers than medium or firm — sustained close contact with memory foam and CertiPUR materials throughout the night. GreenGuard Gold certification confirms independently that no harmful VOCs are emitted from the mattress at levels that could affect indoor air quality. The combination of CertiPUR-certified comfort foam and GreenGuard Gold mattress certification covers both the individual foam component and the assembled mattress product — comprehensive independent verification of clean sleep environment materials.
Product Specs at a Glance
| Model | Split Head Summit Hybrid — Plush |
| Comfort Level | Plush |
| Profile / Height | 15" |
| Head Section | Split — two independent halves for individual head elevation |
| Cover | CoolStream fabric — active heat dissipation at surface |
| Comfort Layer | High density titanium memory foam — deep body contouring, reduced heat retention |
| Cooling System | Ice Flex Cooling Bands — temperature regulation within the comfort layer |
| Transition Layer | CertiPUR-US certified comfort foam — independently tested, no harmful compounds |
| Support Core | 7-Series individually pocketed coil system — independent response, minimal motion transfer |
| Edge Support | Foam encasement — full-perimeter stability, edge-to-edge usable surface |
| Certifications | ✅ GreenGuard Gold · ✅ CertiPUR-US foam |
| Warranty | ✅ 20 years |
| Available Sizes | California King · Eastern King only |
| Packaging | Bed-in-Box — compressed for delivery, expands to full 15" profile |
| Price | $1,734.75 (California King and Eastern King) |
Setup notes: The Split Head Summit Hybrid ships as a Bed-in-Box — two separate compressed packages for the split head section plus the foot section, or as configured by the manufacturer. Place on a compatible split-head adjustable base or flat platform frame. Allow 24–48 hours for the memory foam and coil system to fully expand to the 15" profile before use. Deep-pocket fitted sheets rated for 16"+ depth are required. Split-head fitted sheets — designed to accommodate the head section division — are available from specialist bedding retailers and are strongly recommended for the best appearance and fit on a split head mattress.
Complete Your Sleep Setup.
- Mattress Pads & Protectors — a waterproof mattress protector is essential for a mattress at this investment level; for a split head mattress, two split-head or standard California King / Eastern King protectors may be needed to cover both sections; browse the full range in the Mattress Pads & Protectors collection
- Sheets & Pillowcases — deep-pocket split-head fitted sheets rated for 16"+ depth are required for both the split head design and the 15" mattress profile; standard fitted sheets will not accommodate the split head seam correctly; browse available sheet sets and confirm split-head compatibility and pocket depth before purchasing
- View all Mattresses & Toppers →
Frequently Asked Questions
Do I need a special adjustable base for this mattress?
Yes — to use the independent head elevation functionality, you need a compatible split-head adjustable base designed for California King or Eastern King split-head mattresses. The adjustable base must have independent head section controls for each side. Without a split-head adjustable base, the mattress functions as a standard California King or Eastern King plush hybrid — the split seam is present but both sides lie flat together on a standard platform frame. The mattress is sold separately from any adjustable base.
Does the split head mean the mattress feels like two separate beds?
No — the foot section of the mattress is a single, continuous unified surface. Only the head section (approximately the top third to half of the mattress length) is split. When lying flat, both sides of the split head section lie in the same plane and the mattress feels like a single shared bed. The seam of the split is present but does not create a noticeable gap or ridge in normal flat sleep. Independent head elevation is only perceptible when the adjustable base actually raises one side.
What is the difference between California King and Eastern King for this mattress?
California King measures 72"W × 84"L — 4" narrower and 4" longer than a standard King. Eastern King measures 76"W × 80"L — the same dimensions as a standard King. Both are available for this split head mattress at the same price ($1,734.75). Choose California King for taller sleepers who need the extra length; choose Eastern King for a wider shared sleep surface on a standard King-sized bed frame. Confirm your adjustable base's size compatibility before purchasing — split-head adjustable bases are typically specified for either Cal King or Eastern King, not both.
What type of sheets work on a split head mattress?
Split-head mattresses require split-head fitted sheets — fitted sheets with the head portion of the sheet split into two separate elastic sections that each wrap independently around each half of the split head. Standard fitted sheets will pull off one or both sides of the split head section when the adjustable base raises either side. Deep-pocket depth (16"+) is also required for the 15" mattress profile. Split-head fitted sheets are available from specialist bedding retailers; confirm California King or Eastern King sizing and 16"+ pocket depth when ordering. Browse the Sheets & Pillowcases collection for available deep-pocket options.
Is this mattress available in standard King or Queen sizes?
No — the Split Head Summit Hybrid is available in California King and Eastern King only. The split head design is specific to King-sized mattresses where there are two sleeping partners who may want independent head elevation. For the Summit Hybrid in smaller sizes without the split head, the standard Summit Hybrid Plush is available in Twin through Eastern King as a single unified mattress. For the split head configuration, California King and Eastern King are the only available sizes.
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