S4 Nebula Luxury Hybrid Mattress in bedroom setting with a plush blue upholstered frame and deep blue walls.

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.

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

Plush Medium Firm Pillow top Memory foam Hybrid

iDealBed S4 Nebula Luxury 12" Hybrid Mattress – Medium Firm

$699.00

$1,399.00

Save $700.00

Brand:

iDealBed

i Size Guide

$699.00

Only 22 left in stock

Free USA Wide Delivery

10 Year Warranty

Advanced Technology

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

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.

DISCOVER WHY BUYING WITH

CLOUDY MATTRESS IS THE SMARTER CHOICE

From better sleep support to trusted quality, Cloudy Mattress gives you more value for your money.

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24 / 7 CUSTOMER SUPPORT

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EXPERT GUIDANCE

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BEST PRICE GUARANTEED

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This bed is heavenly

The mattress feels like sleeping on a cloud. I've been using it for 6 weeks now, no complaints at all. I've never been so comfortable in bed and my poor sleep quality has improved drastically.

King size mattress

This mattress is a great value. I have been sleeping on it for 3 days. I wake in the morning with little or no pain. I have M.S and I have terrible pain. I used the box springs from other mattress and put ply-wood between the box springs and the mattress. I ordered a medium firm. This mattress is a blessing. So happy I ordered this mattress.

Great Matress

I love my new matress. Excellent back support, soft and I can rest all Night without any kind of pain in the morning.

Exactly what I wanted!

I have never had a bed bigger than a full in my life and was nervous that I wouldn't get what I wanted or like it. This mattress is perfect. Even better than I imagined. No problems whatsoever. Simple unpacking and paired with a simple platform I am now in heaven. My only issue is figuring out where to sleep... So I sleep everywhere!!👏👏👏

Super comfy, good for people with chest and back pain

Super comfy, good for people with chest and back pain, I’ve had multiple heart surgeries and have also broken my back before, the mattress I had was starting to cause me a lot of pain and it was time for a new one, I got the 11inch king and it is great! I can sleep in all my usual positions and do so feeling no pain like I normally would. Great for minimal pressure on sore areas and I would 100% recommend.

HAVE QUESTIONS?

WE'VE GOT ANSWERS

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.

Still

Have Questions ?

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