S4 Nebula Luxury Hybrid Mattress in bedroom setting with a plush blue upholstered frame and deep blue walls. Angled view of the 12 inch S4 Nebula Luxury Hybrid Mattress showcasing its supportive edge and modern profile. S4 Nebula Luxury Hybrid Mattress front view featuring black diamond-quilted fabric and vibrant blue accent trim. S4 Nebula Luxury 12 inch Hybrid Mattress layer diagram featuring cooling foam and medium firm coil support system. S4 Nebula Luxury Hybrid Mattress on an adjustable base with the head raised in a modern luxury bedroom setting. Full room view of the S4 Nebula Luxury Hybrid Mattress styled in a contemporary space with light wood accents. Full room view of the S4 Nebula Luxury Hybrid Mattress styled in a contemporary space with light wood accents. Medium firm S4 Nebula Luxury Hybrid Mattress shown on a dark grey platform bed in a bright modern bedroom. S4 Nebula Luxury Hybrid Mattress styled in a coordinated blue bedroom setting highlighting its 12 inch height.
iDealBed S4 Nebula Luxury 12" Hybrid Mattress – Medium Firm
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iDealBed S4 Nebula Luxury 12" Hybrid Mattress – Medium Firm

$699.00
$1,399.00
Save $700.00
Brand: iDealBed
Size
Best for Stomach sleepers
i Size Guide
$699.00
Out of stock
Free USA Wide Delivery Free USA Wide Delivery
10 Year Warranty 10 Year Warranty

The iDealBed S4 Nebula Luxury 12" Hybrid Mattress delivers a balanced medium-firm wrapped coil mattress feel that cradles yet supports. 

A plush SmartTemp® Tencel cover (infused with Aloe and naturally hypoallergenic) keeps the surface cool to the touch while wicking moisture away. 

Moreover, two layers of cooling gel-infused memory foam layers adapt to every contour, providing targeted pressure point relief and promoting optimal spinal alignment support. Because of this heat-dissipating design, even hot sleepers experience undisturbed rest. 

Deeper still, individually wrapped spring coils respond independently to weight changes, damping partner movement, and enhancing edge-to-edge stability with high-density edge support foam. 

As for practical guarantees, there’s a 120-night risk-free sleep trial, a 10-year non-prorated warranty, and free USA-wide delivery.

SmartTemp Cooling Cover

Breathable Tencel knit stays cool and hypoallergenic all night.

ThermalRelief Gel Foam

Absorbs excess body heat for a stable sleep temperature.

CustomComfort Pocketed Coils

React individually for reduced motion transfer for couples.

EdgeGuard Encasement

Reinforced borders prevent sagging and maximise usable surface.

BreezeFlow Vent Panel

Continuous airflow promotes deep, restorative sleep comfort.

Ultra-HD FlexSupport Core

Adds lumbar lift for a luxury hotel-quality sleep feel.

Key Mattress Benefits

iDealBed S4 Nebula Luxury 12" Hybrid Mattress – Medium Firm

6 Layers
Of Cooling
Comfort

Breathable Tencel fabric with Aloe infusion wicks moisture and keeps the sleep surface cool and hypoallergenic.

Fiberglass-free cotton layer provides safe flame resistance while maintaining airflow and comfort.

Gel-infused foam contours to the body while drawing heat away for cooler and more comfortable sleep.

Responsive memory foam enhances contouring and helps distribute body weight evenly across the mattress.

Individually wrapped coils deliver targeted support and reduce motion transfer while reinforced edges improve stability.

Ventilated base structure promotes airflow while providing durable support and long-term structural integrity.

iDealBed S4 Nebula Luxury 12" Hybrid Mattress – Medium Firm
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FASTEST SHIPPING

Get your new mattress delivered quicker than ever with our priority nationwide shipping. No long waits, comfort arrives right at your door step, fast.

CUSTOMER SUPPORT

24 / 7 CUSTOMER SUPPORT

Whether its day or night, our dedicated team is always available to answer questions, resolve issues, and guide you through every step.

GUIDANCE

EXPERT GUIDANCE

Not sure which mattress suits you best? our sleep experts are here to help you choose the perfect option tailored to your comfort, health and lifestyle needs.

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HAVE QUESTIONS?

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Designed for deep comfort and better rest, so you wake up refreshed and ready for the day

Yes. Its medium-firm feel, adaptive foams, and zoned coils are rated “Best for Back & Stomach Sleepers,” keeping your spine aligned while easing pressure.

The mattress registers as “Medium Firm Comfort” on iDealBed’s internal scale—ideal if you like a supportive surface with slight contour.

Absolutely. The SmartTemp cover plus ThermalRelief gel memory foam channels heat away, while the BreezeFlow panel circulates fresh air.

Most 12" hybrids flex fine, but we recommend confirming with our team or choosing iDealBed bases designed for hybrid support.

Generally, allow hybrids 24-48 hours to reach full height; light off-gassing is normal and dissipates quickly in a ventilated room.

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