Serta iSeries NXG 1500 12 inch Hybrid Firm mattress on a wooden platform bed in a modern bedroom. Angled view of the Serta iSeries NXG 1500 Hybrid Firm mattress featuring a cooling geometric cover. Serta iSeries NXG 1500 12" Hybrid Firm mattress paired with a matching low-profile support foundation. Cross-section of Serta iSeries NXG 1500 Hybrid Firm mattress showing pocketed coils and memory foam. Diagram of the iSeries NXG 1500 Hybrid Firm mattress providing optimal spinal alignment for back sleepers. 12-inch side profile of the Serta iSeries NXG 1500 Hybrid Firm mattress with durable navy blue border. Front view of the Serta iSeries NXG 1500 12 inch Hybrid Firm mattress for stable, supportive sleep. Top-down view of the Serta iSeries NXG 1500 Hybrid Firm mattress's breathable, cooling geometric fabric. Close-up of the Serta iSeries NXG 1500 logo on the durable navy blue border of a firm hybrid mattress. Serta iSeries NXG 1500 Hybrid Firm mattress in a styled bedroom for supportive, pressure-relieving sleep. Firmness scale highlighting the Serta iSeries NXG 1500 Hybrid Firm level for a stable, lifted feel. Feature diagram of the iSeries NXG 1500 Hybrid Firm mattress with 5-zone coils and cooling technology.
Serta iSeries NXG 1500 Hybrid Firm 12 Inch Mattress
Plush Medium Firm Pillow top Memory foam Hybrid

Serta iSeries NXG 1500 Hybrid Firm 12 Inch Mattress

$1,599.00
$2,499.00
Save $900.00
Brand: Serta
i Size Guide
$1,599.00
Only 17 left in stock
Free USA Wide Delivery Free USA Wide Delivery
10 Year Warranty 10 Year Warranty
Advanced Technology Advanced Technology

To begin with, the Serta iSeries NXG 1500 Hybrid Firm greets you with a breathable knit cover that feels immediately cool and dry. Next, a layer of NXG Next Generation Memory Foam infused with conductive gel eases surface pressure while drawing heat away, creating a breathable heat-dissipating surface that firm-mattress fans rarely find.

Because this comfort foam rests on a Duet coil-in-coil support system, you receive targeted spinal alignment support that back sleepers call the best 12-inch firm mattress for back pain. 

Each inner micro-coil nests inside a taller outer coil, so weight is lifted smoothly while keeping motion in one zone, ideal for couples who need reduced motion transfer. High-density rails encase every edge, expanding usable space and extending durability. 

Finally, you can buy Serta iSeries NXG 1500 online today through Cloudy Mattress, lock in free nationwide shipping, split payments with Affirm, and enjoy a 120-night risk-free trial—all while the Memorial discount still applies.

Firm Hybrid Support

Duet coils and dense NXG foam hold the spine flat for restorative alignment.

5-Zone Pressure Relief

Coil-in-coil design tailors push-back beneath shoulders, lumbar, and hips.

Gel-Enhanced Cooling

Conductive gel particles in NXG foam move heat away for steadier temperature.

Motion-Quiet Construction

Individually wrapped coils flex independently so partners sleep undisturbed.

Ultimate Edge® Stability

High-density foam encasement stops roll-off and makes sitting easy.

Risk-Free Ownership

120-night trial and 10-year warranty protect your purchase.

Key Mattress Benefits
Serta iSeries NXG 1500 Hybrid Firm 12 Inch Mattress

6 Layers
Of Cooling
Comfort

Breathable fabric helps wick heat and moisture for a cool first impression.

Next-generation foam contours precisely and disperses warmth.

High-density layer spreads body weight and protects the coil unit.

An inner micro-coil nestled inside an outer coil delivers adaptive lift and zoned support.

Robust rails reinforce edges for edge-to-edge longevity.

Firm bottom foam anchors the hybrid core for years of no-sag performance.

Serta iSeries NXG 1500 Hybrid Firm 12 Inch Mattress
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WE'VE GOT ANSWERS
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Designed for deep comfort and better rest, so you wake up refreshed and ready for the day

Yes. The firm surface and Duet coil core keep hips level and lumbar supported, helping many back sleepers wake with less stiffness.

iSeries blends NXG memory foam with pocketed coils for hybrid lift and airflow, while iComfort uses all-foam construction for deeper contour and lower motion transfer.

Gel-infused NXG foam, an open-coil core, and a breathable cover combine to move heat away faster than traditional firm memory-foam beds.

Yes. The flexible hybrid build bends smoothly on most modern adjustable foundations; just ensure slats are spaced less than three inches apart.

Rated “Firm,” it offers minimal sink and strong push-back—ideal for stomach and back sleepers who need a solid surface without pressure spikes.

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