The Serta iSeries NXG 4500 Hybrid Ultra Plush 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. 5-zone coil system with alternating firm and plush areas supports back and body curves beneath plush layers. BestEdge Support provides edge-to-edge stability. 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 maintaining supportive foundation beneath plush surface.

5-Zone Coil System

The 5-zone hybrid coil system beneath plush layers provides targeted support that prevents excessive sinking. While ultra plush surface cushions pressure points, coils maintain proper spinal alignment. Softer coils beneath shoulders and hips accommodate side sleeping while firmer lumbar coils prevent sagging. BestEdge Support maintains stability from edge to edge.

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 memory foam. This dual cooling approach maintains comfortable temperature even with deep contouring and 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 is ultra plush?

Ultra plush provides maximum softness and cushioning beyond standard plush. Enhanced foam layers create cloud-like feel that deeply cradles body. This is the softest option in the NXG line, ideal for side sleepers who prefer sinking into mattress with exceptional pressure relief.

How does this differ from 2500 plush?

The 4500 offers enhanced plushness with more foam layers for deeper cushioning compared to 2500. Both are plush and ideal for side sleepers, but 4500 provides softer, more luxurious feel with additional contouring. Choose 4500 for maximum softness or 2500 for balanced plush comfort.

Will I sink too much?

No, the 5-zone coil system prevents excessive sinking while plush layers provide cushioning. The hybrid design balances soft surface with supportive foundation. You'll experience deep contouring and pressure relief without losing proper spinal alignment or feeling stuck in the mattress.

Is ultra plush good for back pain?

For side sleepers, yes. The ultra plush cushions pressure points at shoulders and hips that cause pain when inadequately cushioned. The 5-zone coils maintain spinal alignment beneath plush layers. However, back and stomach sleepers typically need firmer support to prevent back pain.