Serta iSeries NXG Mattress 1500 Firm Foam ~ Available in Twin XL, Full, Queen, King and Cal King Sizes

The Serta iSeries NXG 1500 Luxury Firm Foam Mattress delivers immediate cooling, instant pressure relief, and firm support for deeper sleep. Features high-density NXG Memory Foam for contouring pressure relief with luxury firm feel. CoolFeel Cover provides cool-to-touch surface while Carbon Fiber Memory Foam draws heat away from body. High-density foam core provides durable firm support surrounded by Ultimate Edge Support for edge-to-edge stability. All-foam construction delivers superior motion isolation. Great for stomach and back sleepers. Available in Twin XL, Full, Queen, King, and Cal King sizes.

NXG Memory Foam Technology

The high-density NXG Memory Foam provides contouring pressure relief while maintaining luxury firm support foundation. This innovative premium foam responds to body weight without excessive sinking, delivering pressure relief at key contact points while keeping spine properly aligned on firm surface ideal for stomach and back sleeping.

High-Density Foam Core

The premium foam core provides durable firm foundation that prevents lower back arching for stomach sleepers and maintains proper spinal alignment for back sleepers. Unlike hybrid models with coils, the all-foam construction offers consistent firm support and superior motion isolation. Ultimate Edge Support maintains stability from edge to edge, preventing roll-off and maximizing sleeping surface.

The CoolFeel Cover provides cool-to-touch surface that delivers immediate cooling sensation when you lie down, helping you fall asleep faster. The fabric dissipates body heat for comfortable initial contact with mattress surface.

The Carbon Fiber Memory Foam layer actively draws heat away from body throughout the night. Carbon fiber's thermal conductivity pulls warmth from sleep surface and disperses it, maintaining comfortable temperature. The firm surface prevents deep sinking that can trap heat, working with cooling layers to address heat retention common in all-foam mattresses.

Use mattress protector to guard against stains. Rotate head-to-foot every three to six months for even wear. Avoid jumping or standing on mattress. Do not fold or bend. Allow new mattress to air out for 24-48 hours after unboxing.

What is luxury firm?

Luxury firm provides firm support with thin comfort layer that softens initial contact without compromising firmness. More firm than medium but less rigid than extra firm, offering firm foundation ideal for stomach and back sleepers while maintaining premium feel and comfort.

How does all-foam differ from hybrid?

All-foam offers superior motion isolation and consistent firm support without coils. While hybrid 1500 provides some bounce from coils, this all-foam version delivers pure memory foam feel with complete movement absorption. Ideal for light sleepers sensitive to partner movement who prefer classic firm memory foam experience.

Why firm for stomach sleepers?

Firm support prevents lower back arching that occurs when stomach sleepers sink too deeply into soft mattress. The luxury firm foundation keeps hips from dropping below shoulders, maintaining neutral spine alignment. This prevents morning back pain and supports proper sleeping posture.

Does all-foam sleep hot?

Not with cooling technology. The Carbon Fiber Memory Foam and CoolFeel Cover actively dissipate heat to prevent warmth retention common in traditional all-foam mattresses. The firm surface also prevents deep sinking that traps heat, maintaining comfortable temperature throughout the night.