The Serta iSeries NXG 4500 Ultra Plush Foam Mattress delivers immediate cooling, enhanced pressure relief, and cloud-like softness for deeper sleep. Features high-density NXG Memory Foam for exceptional contouring and pressure relief with ultra plush feel. CoolFeel Cover provides cool-to-touch surface while Carbon Fiber Memory Foam draws heat away from body. High-density foam core provides durable support surrounded by Ultimate Edge Support for edge-to-edge stability. All-foam construction delivers superior motion isolation. Ideal for side sleepers who prefer maximum cushioning. Available in Twin XL, Full, Queen, King, and Cal King sizes.

NXG Memory Foam Technology

The high-density NXG Memory Foam provides exceptional contouring with ultra plush feel that cradles body in cloud-like softness. Enhanced foam layers create deep pressure relief at shoulders and hips where side sleepers need maximum cushioning, conforming to body shape while the all-foam construction offers consistent support throughout.

High-Density Foam Core

The premium foam core provides durable foundation that maintains proper spinal alignment beneath ultra plush layers. The all-foam construction offers consistent support and superior motion isolation compared to hybrid models. Ultimate Edge Support maintains stability from edge to edge, preventing roll-off and maximizing sleeping surface even with plush feel.

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 plush 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, preventing heat buildup that can occur with plush all-foam construction. This dual cooling approach maintains comfortable temperature even with deep contouring and maximum cushioning.

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 makes this ultra plush?

Ultra plush provides maximum softness with enhanced foam layers creating cloud-like feel that deeply cradles body. This is the softest all-foam option in the NXG line, offering exceptional cushioning for side sleepers who prefer sinking into mattress with deep pressure relief.

How does all-foam differ from hybrid?

All-foam offers superior motion isolation and consistent contouring without coils. While hybrid 4500 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 memory foam experience.

Will all-foam feel too soft?

For side sleepers, no. The foam core prevents excessive sinking while plush layers provide cushioning. The all-foam construction balances soft surface with supportive foundation. You'll experience deep contouring and pressure relief while maintaining proper spinal alignment for comfortable side sleeping.

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. This dual cooling approach maintains comfortable temperature throughout the night despite plush all-foam construction.