Serta iSeries NXG 3500 Medium Memory Foam 13.5 Inch Mattress

$2,599.00
$3,599.00
Save $1,000.00
Brand: Serta
$2,599.00
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 3500 Medium Mattress welcomes sleepers with a CoolFeel™ cover that feels cool right away. This fabric teams with gel-infused NXG Next Generation Memory Foam to form a cooling hybrid mattress with NXG memory foam that draws heat away while contouring evenly. 

Next, a layer of transitional comfort foam steadies the body on a Duet coil-in-coil support system, delivering targeted spinal alignment support appreciated by back and side sleepers. Because each inner spring sits inside a second coil, weight is distributed gently yet firmly, and partners notice reduced motion transfer for couples when one person moves. High-density rails strengthen the perimeter so you can sit or sleep right to the edge.

 Finally, you can buy Serta iSeries NXG 3500 online today with free shipping in the USA and Affirm financing, locking in the Memorial savings on this 13.5-inch medium hybrid mattress before stock runs low.

Balanced Medium Comfort

Blends gentle contour with healthy push-back for all sleep positions.

5-Zone Duet Coil Core

Inner and outer springs give precise lift under the shoulders, lumbar, and hips.

Gel + Graphite Cooling

Conductive foams enhance advanced heat dissipation technology for cooler nights.

Motion-Quiet Hybrid Design

Individually wrapped coils isolate movement so partners stay asleep.

Reinforced Foam Edge

High-density encasement stops roll-off and lets you use the whole surface.

Risk-Free Trial & Warranty

120-night trial and 10-year Serta warranty add peace of mind.

Key Mattress Benefits
Serta iSeries NXG 3500 Medium Memory Foam 13.5 Inch Mattress

6 Layers
Of Cooling
Comfort

Breathable knit promotes airflow and keeps the surface fresh.

Gel-infused foam contours deeply while moving heat away for a stable temperature.

High-density layer spreads body weight and protects coils beneath.

Inner micro-coil sits inside an outer coil, delivering adaptive lift and zoned pressure relief.

Robust rails surround the coil unit, ensuring edge-to-edge durability.

Firm bottom foam anchors the entire mattress and reduces vibration.

Serta iSeries NXG 3500 Medium Memory Foam 13.5 Inch Mattress
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Designed for deep comfort and better rest, so you wake up refreshed and ready for the day

It is a hybrid that blends NXG memory foam layers with a Duet coil-in-coil spring core for balanced comfort and support.

Yes. The medium feel combines lifting coils with contouring foam to keep the spine aligned, which may ease lower-back tension.

Gel infusion, graphite additives, and a CoolFeel cover help carry heat away, creating a noticeably cooler surface versus standard memory foam.

Yes. Its flexible foam-and-coil construction articulates smoothly on most modern adjustable foundations.

Cloudy lists this model as Medium Comfort, offering a balanced blend of support and cushioning suitable for multiple sleep positions.

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