Serta iSeries NXG 4500 ultra plush hybrid mattress in a modern bedroom with cooling geometric cover. Perspective view of Serta iSeries NXG 4500 13.5 inch ultra plush hybrid mattress with cooling tech. Front profile of the Serta iSeries NXG 4500 ultra plush mattress showing deep comfort layers. Cross-section of Serta iSeries NXG 4500 hybrid mattress showing coil system and comfort foam layers. Serta iSeries NXG 4500 ultra plush mattress on a wooden frame, perfect for side sleepers needing support. Top-down view of the Serta iSeries NXG 4500 mattress cooling cover with intricate blue geometric pattern Close-up texture of Serta iSeries NXG cooling cover fabric designed for temperature regulation. 13.5 inch side profile of the Serta iSeries NXG 4500 ultra plush hybrid mattress. Serta iSeries NXG branding detail on the side of the 4500 ultra plush hybrid mattress. Side sleeper on Serta iSeries NXG hybrid mattress showing perfect spinal alignment and plush comfort. Serta iSeries NXG 4500 firmness scale showing ultra plush comfort level for pressure relief. Exploded layer diagram of Serta iSeries NXG 4500 hybrid mattress with enhanced lumbar support.
Serta iSeries NXG 4500 Hybrid Ultra Plush 13.5 Inch Mattress
Ultra Soft Soft Medium Soft Medium Medium Firm Firm Extra Firm

Serta iSeries NXG 4500 Hybrid Ultra Plush 13.5 Inch Mattress

$2,899.00
$3,799.00
Save $900.00
Brand: Serta
Size
i Size Guide
$2,899.00
Only 22 left in stock
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10-Year Limited Warranty 10-Year Limited Warranty
100-Night Trial 100-Night Trial

To begin with, the 13.5-inch ultra plush hybrid mattress greets you with a CoolFeel™ stretch-knit cover that feels cool and airy from the first touch. Next, layers of NXG Next Generation Memory Foam intertwined with Cool Action Gel Memory Foam melt around your curves, creating a cloud-like pressure relief many side sleepers call “hotel-suite soft.”

Because these foams float above a precision Duet Coil-in-Coil Support System, you still enjoy targeted spinal support for side sleepers that keeps hips lifted while shoulders nestle deeper. Individually wrapped inner and outer springs dampen energy, delivering advanced motion isolation technology so partners remain undisturbed. 

A high-density foam encasement protects every edge, giving the mattress a sturdy perimeter and a luxurious 13.5-inch profile that fits deep-pocket sheets. Finally, you can Buy Serta iSeries NXG 4500 online today through Cloudy Mattress, secure free USA delivery, flexible Affirm financing, and rest easy under a 120-night trial and 10-year warranty while the sale lasts.

Ultra-Plush Contouring

NXG foams cradle shoulders and hips for weightless comfort.

Duet 5-Zone Coil Core

Inner micro-coil nested in an outer coil tailors push-back to each body zone.

Dual-Cooling Gel Technology

Gel particles and open-cell foam pull heat away for a temperature-regulated sleep surface.

Motion-Quiet Hybrid Design

Pocketed coils flex independently, limiting partner disturbance.

Ultimate Edge® Stability

Dense perimeter foam prevents roll-off and expands usable space.

Sale & Easy Payments

Live markdown plus Affirm split pay reduces upfront cost.

Key Mattress Benefits

Serta iSeries NXG 4500 Hybrid Ultra Plush 13.5 Inch Mattress

6 Layers
Of Cooling
Comfort

Breathable fibres wick heat and moisture for a cool, fresh surface.

High-density foam contours deeply yet rebounds quickly while dispersing warmth.

An extra layer deepens pressure relief and keeps temperature steady.

Balances plush contour and gentle lift before the coil unit.

Inner micro-coil nested inside a taller outer coil delivers adaptive lift and zoned pressure relief.

Robust rails strengthen edges for lasting durability and full-surface use.

Serta iSeries NXG 4500 Hybrid Ultra Plush 13.5 Inch Mattress
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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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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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WE'VE GOT ANSWERS
HAVE QUESTIONS?

WE'VE GOT ANSWERS

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

Yes. Ultra-plush NXG foams relieve shoulder and hip pressure while zoned coils maintain alignment, delivering exceptional comfort for side sleepers.

Gel infusion, open-cell foam, and airflow through the coil core help move heat away, so it sleeps noticeably cooler than traditional plush memory-foam beds.

The 4500 offers a softer, thicker comfort package and additional cooling layers compared with the medium-feel 3500, making it the softest model in the iSeries line-up.

Yes. The flexible hybrid build bends smoothly on most adjustable foundations; slats should be less than three inches apart.

Hybrid. Plush NXG memory foam layers sit above individually wrapped Duet coils, blending foam contour with spring responsiveness for balanced, luxurious support.

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