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Serta® iSeries NXG™ 12" Memory Foam Luxury Firm Smooth Top Twin XL Mattress

Experience a series of benefits delivering immediate cooling, instant pressure relief, and ideal support for a deeper, more restful sleep at a price that makes sense. Featuring high-density memory foam, NXG™ memory foam for deep, contouring pressure relief.

Serta® iSeries NXG™ 12" Hybrid Firm Smooth Top Queen Mattress

Serta® iSeries NXG™ the next generation of comfort. Designed with a series of benefits for the sleep you want. Experience immediate cooling, instant pressure relief, and ideal support for a deeper, more restful sleep at a price that makes sense.

Serta® iSeries NXG™ 12" Hybrid Firm Smooth Top King Mattress 

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Serta Mattress Warranty (1).pdf

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Serta® iSeries NXG™ 12" Hybrid Firm Smooth Top Twin XL Mattress-6

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Serta® iSeries NXG™ 12" Hybrid Firm Smooth Top King Mattress

Meets federal fire retardant safety standard

A 5-zoned coil system offers targeted support for your back and body with BestEdge® Support for lasting, edge-to-edge mattress stability

Innovative, high-density, premium memory foam for deep, contouring pressure relief

Topped with a cool-to-the-touch CoolFeel™ Cover and Carbon Fiber Memory Foam draws heat away from the body

Designed to minimize the impact of your partner's movement

This firm feel mattress with a series of benefits for the sleep you want. Experience immediate cooling, instant pressure relief, and ideal support for a deeper, more restful sleep at a price that makes sense. High-density NXG™ Memory Foam provides deep, contouring pressure relief. A cool-to-the-touch cover offers immediate cooling, while Carbon Fiber Memory Foam draws heat away from the body for all-night comfort. The hybrid models feature a 5-zone coil system with alternating firm and plush areas to better support the curves of your back and body.

CertiPUR-US® Certified means our foam was tested for and is free from harmful chemicals and gasses

To protect your mattress from stains and spills, we highly recommend using a mattress protector; This will also help with the overall health and lifespan of your mattress.

We do not recommend applying liquids to the product; Applying liquids may stain the fabric and make the soiled area worse; Moisture or chemicals applied directly to the mattress can cause premature breakdown of the foam and damage the product.

We suggest applying baking soda to the soiled area, let stand about 15 minutes, vacuum, and repeat as needed; Air the product out as much as possible.

Serta iSeries NXG mattresses are compatible with most frames, including: traditional frames, box springs, platform frames, slatted frames, bunky boards, and adjustable frames.

Serta has been in the sleep industry for over 90 years and has been dedicated the entire time to helping people like you find a solution to your sleep problems so you can finally sleep better than you ever have. We love helping people find their best sleep and this is why our brand exists.

We believe that mattress shopping shouldn’t be stressful. We also believe whether you are buying online or in-store, you should be comfortable during the entire purchase process. So no matter if you're a back, stomach or side sleeper or if you sleep at night or during the day, we have a product to help you get the sleep you deserve. Check out some of the things we’ve learned along the way that help us to continue to be able to bring new sleep innovations to the table.

*Mattress only, all other products sold separately. Images may not reflect actual size.

Serta 2025 Black Friday Sale Promo

Serta® iSeries NXG™ 12" Hybrid Firm Smooth Top California King Mattress

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Serta® iSeries NXG™ 12" Memory Foam Luxury Firm Smooth Top Queen Mattress

Serta® iSeries NXG™ 12" Memory Foam Luxury Firm Smooth Top King Mattress

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Serta® iSeries NXG™ 12" Hybrid Firm Smooth Top Twin XL Mattress

Serta® iSeries NXG™ 12" Hybrid Firm Smooth Top Full Mattress

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Experience a series of benefits delivering immediate cooling, instant pressure relief, and ideal support for a deeper, more restful sleep at a price that makes sense. Featuring high-density memory foam, NXG™ memory foam for deep, contouring pressure relie

Premium, high-density foam core surrounded with Ultimate Edge™ Support for lasting, edge-to-edge mattress stability

This firm mattress offers a series of benefits for the sleep you want. Experience immediate cooling, instant pressure relief, and ideal support for a deeper, more restful sleep at a price that makes sense.  High-density NXG™ Memory Foam delivers deep, contouring pressure relief. A cool-to-the-touch cover offers immediate cooling, while Carbon Fiber Memory Foam draws heat away from the body for all-night comfort. Plus, a high-density foam core provides durable support.

Mattress Size:King

Mattress Comfort Level:Firm

Mattress Construction:Hybrid