Serta iSeries NXG 4500 13.5" ultra plush memory foam mattress on a modern wooden bed frame. Angled view of the Serta iSeries NXG 4500 mattress featuring a breathable geometric cooling cover. Internal cooling layers of the Serta iSeries NXG 4500 ultra plush memory foam mattress. Serta iSeries NXG 4500 ultra plush mattress set with a matching high-profile support foundation. 13.5-inch side profile of the Serta iSeries NXG 4500 ultra plush memory foam mattress. Front view of the 13.5-inch Serta iSeries NXG 4500 ultra plush mattress with navy blue border. Close-up corner of the Serta iSeries NXG 4500 mattress showing the premium quilted cooling fabric. Serta iSeries NXG 4500 ultra plush firmness scale for cradled support and motion reduction. Luxury bedroom with the Serta iSeries NXG 4500 ultra plush mattress for a restorative night's sleep. Layer diagram of Serta iSeries NXG 4500 mattress showing advanced contouring memory foam.
Serta iSeries NXG 4500 Ultra Plush Memory Foam 13.5 Inch Mattress
Ultra Soft Soft Medium Soft Medium Medium Firm Firm Extra Firm

Serta iSeries NXG 4500 Ultra Plush Memory Foam 13.5 Inch Mattress

$2,899.00
$3,999.00
Save $1,100.00
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 Serta iSeries NXG 4500 Ultra Plush Mattress welcomes you with a CoolFeel™ cover that feels cool at first touch. Next, layers of NXG Next Generation Memory Foam infused with gel cradle every curve, delivering a cloud-like soft sleep surface that side-sleepers rank among the softest 13.5-inch beds available. 

Beneath this deep plush, a transitional comfort layer settles the body onto a Duet coil-in-coil support system, providing targeted spinal alignment support and lively push-back that keeps hips level even in ultra-soft comfort. 

Individually wrapped springs flex independently, creating advanced motion isolation for couples so you feel less movement when your partner turns. High-density foam encasement reinforces every edge, expanding usable surface and adding durability. 

Finally, you can buy Serta iSeries NXG 4500 online through Cloudy Mattress, enjoy free shipping in the USA, fast delivery, and easy Affirm financing—all while the Memorial sale knocks $1,500 off this luxury profile.

Ultra-Plush Pressure Relief

Deep NXG foams melt away tension in shoulders and hips.

Duet 5-Zone Coil Core

Inner-and-outer springs tailor support under each zone for balanced alignment.

Gel-Driven Cooling

Conductive gel plus a CoolFeel cover disperses heat for a breathable night’s rest.

Motion-Quiet Hybrid Design

Pocketed coils absorb energy; partners sleep undisturbed.

Ultimate Edge® Stability

High-density rails prevent roll-off and make sitting easier.

Risk-Free Trial & Warranty

120-night trial and 10-year warranty let you test it without worry.

Key Mattress Benefits

Serta iSeries NXG 4500 Ultra Plush Memory Foam 13.5 Inch Mattress

6 Layers
Of Cooling
Comfort

Breathable fabric delivers an instant, cool-to-the-touch sensation.

High-density, next-generation foam contours deeply while drawing heat away for cooler sleep.

Balances plush contour with gentle push-back before the coil layer.

Nested inner micro-coil inside a taller outer coil delivers adaptive lift and 5-zone pressure relief.

Robust rails reinforce edges for durability and full-surface use.

Firm bottom foam anchors the hybrid core and dampens vibration.

Serta iSeries NXG 4500 Ultra Plush Memory Foam 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.

SHIPPING

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.

GUARANTEED

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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

Hybrid. Plush NXG memory foam layers rest above a Duet coil-in-coil spring core, blending foam pressure relief with responsive support.

Yes. Ultra-plush foams cradle joints, and zoned coils maintain alignment, offering exceptional comfort for side sleepers seeking maximum softness.

Gel infusion in NXG foam and the CoolFeel cover help transport heat away, producing a cooler surface than traditional plush memory foam beds.

Rated “Ultra Plush,” it offers the softest feel in the iSeries family—ideal for sleepers who enjoy deep body-hugging comfort.

Yes. The flexible hybrid construction is compatible with most modern adjustable foundations—just ensure any slats are less than three inches apart.

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