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Blue Serta iSeries NXG mattress with a brand logo on a wooden bed frame in a bedroom setting.

Blue Serta iSeries NXG mattress with a brand logo on a wooden bed frame in a bedroom setting.

Serta iSeries NXG 4500 Ultra Plush mattress with features highlighted on a blue background

Hand on a blue Serta iSeries NXG mattress textured blanket with comfort level description

Serta iSeries NXG 4500 Ultra Plush mattress with a person lying on it, against a gray background.

Serta mattress features with ratings, sleep compatibility, and system details on a dark blue background.

Blue Serta iSeries NXG mattress with brand logo on a white background

Blue Serta iSeries NXG mattress with brand logo on a white background

Serta iSeries NXG advertisement with features on a dark blue background

Logo with 'Made in the U.S.A. with Global Components' text and a cartoon sheep on a dark blue background.

Serta® iSeries® NXG™ Mattress - 4500 Ultra Plush Foam

$2,499.00
An Ultra Plush mattress featuring high-density memory foam, NXG™ Memory Foam delivers deep, contouring pressure relief. CoolFeel® Plus System offers increased cooling by drawing heat away from the body for all-night comfort. Plus, a high-density foam core provides durable support with Ultimate Edge™ Support.
Size
  • Twin XL
  • Full
  • Queen
  • Split Head Queen
  • King
  • Split Head King
  • Cal King

100-Night Trial

Free Shipping & Returns

10-Year Limited Warranty

Overview
Feel

Ultra Plush

Support

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

Pressure Relief

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

Cooling

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

Motion Control

Designed to minimize the impact of your partner's movement

Made for

Ideal for side sleepers

Details
Materials & Construction

This Ultra Plush 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 memory foam, 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. Plus, a high-density foam core provides durable support.

  • NXG Memory Foam: Innovative, high-density, premium memory foam for deep, contouring pressure relief
  • Carbon Fiber Memory Foam with CoolFeel™ Plus System: Get that “ahh” right as you lie down with a cool-to-the-touch cover that provides immediate cooling, while cooling memory foam draws heat away from the body for all-night comfort
  • EverCool® Supreme Memory Foam: A dynamic combination of cooling, premium memory foam to cradle and cool you in a pressure-relieving embrace
Responsibly crafted
  • CertiPUR-US® Certified means our foam was tested for and is free from harmful chemicals and gasses
  • Made in the U.S.A. with global components
Care
  • 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.
Compatibility
  • Adjustable base compatible, as well as most frames and foundations, including: traditional frames, box springs, platform frames, slatted frames, bunky boards.
Shipping, Returns & Warranty
Shipping

We will ship your order using the fastest, safest, and most reliable method possible. When ordering directly through Serta.com, most of our items will arrive to your home in 2-4 weeks. Typically, within 1 week of your order being placed, our delivery partner, RXO Logistics, will contact you to schedule out a delivery date and time based on when they expect to receive the product(s). Please note, we are not shipping to Alaska and Hawaii at this time.

Free White Glove Delivery & Haul Away

Get fast, professional in‑home setup and free removal of your old mattress. Perfect for shoppers searching for easy mattress delivery, no setup, and free haul‑away service—everything you need for a hassle‑free upgrade.

Warranty

You should be able to rely on the quality of your rest night after night. That is why we offer a 10-year limited warranty that covers manufacturing and workmanship defects. If you do notice anything out of the ordinary, simply email us or call us at 1-888-557-3782 and we’ll work with you to find a solution.

Returns

Any purchase directly from Serta.com is covered under our 100-Day In-Home Trial. Starting on the day of delivery, we recommend sleeping on your new mattress for a minimum of 30 days to allow your body to adjust. In the event you decide this mattress isn't right for you, and you’re within the 100-Day In-Home Trial, contact us by phone or e-mail and we can coordinate a return. Please note that the 100-Day In-Home Trial applies only to purchases made on Serta.com.

Inside Your Serta® iSeries NXG™ 4500 Ultra Plush

Immediate Cooling

Cool-to-the-touch fabric delivers instant cooling, and Carbon Fiber Memory Foam redistributes heat.

Instant pressure relief

High-density NXG™ Memory Foam cradles your body and relieves pressure.

Ideal support

A 5-zoned coil system enhances back and body support.

Carbon Fiber Memory Foam CoolFeel System

Hand pressing NXG Memory Foam surface

Support System Options for Mattresses

Comfortable mattress with couple and cat

Shopping your way

Try out a Serta in-store,
hassle-free

Want to test out and feel our products before you buy? Our Sleep Ambassadors will offer you a personalized, no-pressure in-store experience. Visit a store near you today.

Store Locator

FAQs

How does iSeries NXG Foam 4500 feel?
This is an Ultra Plush all-foam mattress that is ideal for those who want deep pressure relief without compromising on support. Cradles the body while providing maximum cushioning comfort.
What type of support system does this model use?
The iSeries NXG Foam 4500 features a high-density foam core, premium NXG™ Memory Foam, and Ultimate Edge™ Support for lasting, edge-to-edge mattress stability.
Does the iSeries NXG Foam 4500 sleep cool?
Yes, this mattress is designed for all-night cooling comfort with the CoolFeel™ Cover for immediate cooling. A Carbon Fiber Memory Foam helps channel heat away from the body with contouring pressure relief.
Should I choose a foam or a hybrid model?
Sleepers who enjoy a body-conforming and cradling feel might prefer an all-foam mattress. While those who prefer the responsive “bounce” of a traditional mattress might select a hybrid.