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A modern bedroom with a wooden bed frame and nightstands, featuring a blue Serta iSeries NXG 3500 Hybrid — Firm mattress with geometric patterns, a gray pillow, and a patterned cushion against a blue wall.

Close-up of the Serta iSeries NXG 3500 Hybrid — Firm mattress corner with a blue border, highlighting its durable edge-to-edge support. Text: “Hybrid Firm Edge to Edge Support for lasting mattress stability every night.”.

A Serta iSeries NXG 3500 Hybrid — Firm mattress is shown cut open, showcasing its instant cooling, immediate pressure relief, and targeted support from a 5-zoned coil system.

A hand presses on a blue Serta iSeries NXG 3500 Hybrid — Firm mattress with a dotted pattern. The firmness scale shows "Firm," and text notes its stable, slightly comfortable feel, perfect for those who want firm support.

A woman lies on her side on a Serta iSeries NXG 3500 Hybrid — Firm mattress, its layered construction revealed. Text highlights the firm, supportive feel—ideal for stomach and back sleepers.

Four icons highlight Serta iSeries NXG 3500 Hybrid — Firm: 30,000+ reviews, firm feel for stomach/back sleepers, CoolFeel cover with snowflake symbols, and a hybrid design combining spring and foam.

The Serta iSeries NXG 3500 Hybrid — Firm is a blue memory foam mattress with geometric patterns, cooling symbols, and an "iSeries" label, offering firm support and advanced comfort.

A blue Serta iSeries NXG 3500 Hybrid — Firm mattress with a geometric pattern sits on a matching blue foundation. Two foundation heights are available: 9 inches (shown) and 5 inches.

A close-up of a bed with a blue geometric-patterned mattress and white snowflake icons. Text: "CoolFeel™ Cover on the Serta iSeries NXG 3500 Hybrid — Firm delivers instant cooling, letting you fall asleep faster on a firm, refreshing surface.

A hand presses into beige memory foam, leaving an indentation. Text: "NXG™ Memory Foam in the Serta iSeries NXG 3500 Hybrid — Firm: advanced high-density foam delivers deep, contouring pressure relief.

A hand presses into a gray memory foam surface, leaving an indentation. Text reads "Serta iSeries NXG 3500 Hybrid — Firm," highlighting its firm, pressure-relieving support and body-cradling comfort for better sleep.

Serta iSeries NXG 3500 Hybrid — Firm: Enjoy a fiberglass-free, USA-made mattress with firm support, a 10-year limited warranty, free shipping/returns, an in-home trial, and adjustable base compatibility.

A cartoon sheep stands under a circle with a waving American flag and the text “Made in the U.S.A. With Global Components,” highlighting the quality of the Serta iSeries NXG 3500 Hybrid — Firm mattress on a dark blue background.

Serta iSeries NXG 1500 Hybrid — Firm

Name: Serta iSeries NXG 1500 Hybrid — Firm
Brand: Serta
SKU: 12749
Availability: InStock

Price range: $1,399.00 through $2,299.00

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Price range: $1,399.00 through $2,299.00

Size

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Description

The iSeries NXG 1500 Hybrid (Firm) is built for those who need firm surface support. It uses dense foams and structural coils to maintain shape and resist deep compression.

Firm Feel — Minimal give, maximum support
Cooling Features — CoolFeel™ cover with carbon fiber memory foam to regulate temperature
Dense Foam Layers — Built for firmness and durability
Zoned Coil Support — Keeps spinal alignment under mattress surface
Best For — Sleepers who prefer a firmer feel: stomach and back sleepers

Additional information

Size	Twin, Twin XL, Full, Queen, King, Cal King

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