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Experience the perfect balance of comfort and support with the Serta® iSeries® NXG™ 3500 Hybrid Medium Mattress. This thoughtfully engineered hybrid design delivers immediate cooling comfort, instant pressure relief, and ideal support that adapts seamlessly to your body's natural contours. Featuring advanced NXG Memory Foam technology and a sophisticated 5-zone coil system, this medium-firm mattress creates the optimal sleep environment for all sleep positions. Discover the evolution of sleep technology where innovative cooling meets contouring pressure relief for nights of deeper, more restorative rest at a price that makes sense.


Experience the instant relief of immediate cooling technology that begins working the moment you lie down. The CoolFeel™ Cover delivers that satisfying "ahh" sensation with its cool-to-the-touch surface, helping you fall asleep faster by eliminating the initial heat buildup that can disrupt your sleep onset.
Beneath the surface, Carbon Fiber Memory Foam actively draws heat away from your body throughout the night, redistributing warmth and maintaining a consistently comfortable sleep temperature. This dual-layer cooling approach ensures you stay cool from the moment you get into bed until you wake up refreshed, making hot nights a thing of the past.

The 3500 Hybrid Medium features innovative NXG™ Memory Foam—a high-density, premium memory foam that provides deep, contouring pressure relief exactly where you need it most. This advanced foam technology cradles your body's natural curves, distributing weight evenly and eliminating pressure points that can cause discomfort and restless sleep.
The medium feel strikes the perfect balance between plush comfort and firm support, making it ideal whether you sleep on your back, side, or stomach. The NXG Memory Foam adapts to your unique shape while maintaining proper spinal alignment, ensuring that every curve of your body receives the perfect amount of cushioning without excessive sinkage. This creates a sleep surface that feels both supportive and comforting, regardless of your preferred sleep position.

The sophisticated 5-Zone Coil Support System represents a breakthrough in personalized mattress support. This innovative design features alternating firm and plush zones strategically positioned to better support the natural curves of your back and body. Unlike uniform coil systems, the zoned approach recognizes that different areas of your body require different levels of support.
Your shoulders and hips receive plush, contouring support that allows them to sink in comfortably, while your lumbar region and core benefit from firmer support that maintains proper spinal alignment. This targeted approach ensures that every part of your body receives the ideal level of support, promoting healthy sleep posture and reducing morning stiffness or discomfort. The medium firmness level makes this system work harmoniously for sleepers of all types.

Experience the peace of undisturbed sleep with the 3500 Hybrid Medium's advanced motion control design. The combination of memory foam layers and pocketed coil system works together to minimize the impact of your partner's movements, ensuring that tossing, turning, or getting in and out of bed doesn't disrupt your rest.
This motion-isolating technology is particularly valuable for couples with different sleep schedules or movement patterns. Whether your partner gets up early or moves frequently during the night, you'll enjoy uninterrupted sleep thanks to the mattress's ability to absorb and contain motion within each sleeping zone. The medium firmness level provides responsive support while still effectively isolating movement.

The BestEdge® Support technology ensures that every inch of your mattress provides consistent support and stability, from the center to the very edges. This innovative edge support system prevents the sagging and compression that can occur in traditional mattresses, maximizing your usable sleep surface and providing a firm, stable edge for sitting or sleeping near the perimeter.
Whether you're someone who sleeps near the edge, needs extra space for stretching out, or simply appreciates the confidence of knowing your mattress won't sag over time, BestEdge® Support delivers lasting edge-to-edge stability. This technology ensures that your mattress maintains its shape and support characteristics throughout its entire lifespan, providing consistent comfort wherever you choose to sleep.

The iSeries NXG 3500 Hybrid Medium is CertiPUR-US® Certified, meaning all foam components have been rigorously tested and verified to be free from harmful chemicals and gasses. This certification ensures that your mattress meets strict standards for content, emissions, and durability, providing you with peace of mind about the materials you're sleeping on every night.
This commitment to responsible manufacturing means you can rest easy knowing that your mattress is not only comfortable and supportive but also safe for you and your family. The CertiPUR-US® certification represents a dedication to quality, safety, and environmental responsibility that extends beyond comfort to encompass your overall health and well-being.
39"W x 79.5"L x 13.5"H
Weight: 105.41 lbs
54"W x 74.5"L x 13.5"H
Weight: 134.01 lbs
60"W x 79.5"L x 13.5"H
Weight: 158.34 lbs
60"W x 79.5"L x 13.5"H
Weight: 161.71 lbs
76"W x 79.5"L x 13.5"H
Weight: 196.66 lbs
72"W x 83.5"L x 13.5"H
Weight: 196.19 lbs
76"W x 79.5"L x 13.5"H
Weight: 166.9 lbs
The Serta® iSeries® NXG™ 3500 Hybrid Medium Mattress represents the perfect balance of next-generation sleep technology, combining immediate cooling comfort with instant pressure relief and ideal support. This medium-firm hybrid design is thoughtfully engineered for all sleep positions, delivering versatile comfort that adapts to your body's unique needs without compromising on support or temperature regulation.
With its innovative NXG Memory Foam, advanced cooling technology, and sophisticated 5-zone coil system, the 3500 Hybrid Medium delivers a sleep experience that works harmoniously for back, side, and stomach sleepers alike. The BestEdge® Support ensures lasting edge-to-edge stability, while CertiPUR-US® certification provides peace of mind about the quality and safety of your investment. Backed by a 100-night in-home trial and 10-year limited warranty, this mattress offers exceptional value with the perfect combination of comfort, support, and confidence in your purchase decision.
Serta® mattresses or foundations used with proper support are protected by a 10 year limited manufacturer’s warranty. Serta products are warrantied against manufacturing defects in workmanship and material (excluding covers and handles, except for handles on iSeries and equivalent level mattresses).
The warranty coverage runs from the original date of purchase. Replacement of the mattress or foundation does not extend its limited warranty or begin a new limited warranty period. Your warranty period is based on the code printed on your white law label as indicated on the Warranty Code Chart. The duration of any applicable implied warranties, including but not limited to the implied warranties of merchantability and fitness, shall not exceed the term of this limited warranty. (Some states do not allow limitations on how long an implied warranty lasts, so this limitation may not apply to you.) Serta® shall not be liable for incidental or consequential damages that result from the use of your Serta® product. (Some states do not allow the exclusion or limitation of incidental or consequential damages, so this exclusion may not apply to you.) No expressed or implied warranties are extended to persons who purchase the product from anyone other than Serta Simmons Bedding Company or its authorized dealers, and all warranties to such persons, including the implied warranties of merchantability and fitness, are hereby excluded.
If your Serta® mattress or foundation fails due to a manufacturing defect, the exclusive remedy under this warranty will be replacement of the defective product in the U.S., Puerto Rico or U.S. Virgin Islands. If the Serta® product you purchased is discontinued at the time of replacement, a current model of comparable quality and value will be selected. To receive service under the terms of this warranty contact your original Serta® dealer. If your original Serta® dealer is no longer in business or you have moved outside the service area, please contact Serta Customer Service at 1-888-55-SERTA (1-888-557-3782) between the hours of 9am to 5pm EST Monday - Friday. A copy of original bill of sale is needed to determine original date of purchase. Model name label and law label must be provided to identify the bedding and validate this warranty.
This warranty gives you specific rights, and you may have other rights, which vary from state to state. This warranty is extended only to the original purchaser from Serta Simmons Bedding Company or its authorized dealers.