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Serta

Serta ThermaGel Cooling, Pressure-Relieving Memory Foam Mattress Topper, 3 Inch, King, Made in The USA

  • Based on 9,826 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Wednesday, Mar 18
Order within 5 hours and 36 minutes
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Size: King 79"x75"


Item Display Height: 3 Inches


Features

  • BREATHABLE GEL-INFUSED FOAM: Engineered with ThermaGel-infused memory foam to provide cooling comfort and support
  • COOLING TECHNOLOGY: ThermaGel particles help create a refreshing sleep surface by drawing heat away from the body
  • CONTOURING SUPPORT: Adapts and conforms to your bodys natural shape for enhanced comfort and targeted support
  • MATTRESS ENHANCEMENT: Adds a layer of comfort and helps extend the life of your existing mattress
  • MADE IN THE USA: Proudly crafted in the USA using high-quality materials for lasting durability

Description

Sleep like you’ve never slept before on this mattress topper from Serta. As part of the Serta family of comfort solutions, this ThermaGel memory foam topper can improve any night’s rest on top of virtually any mattress. This adaptable mattress pad conforms to the sleeper’s unique body shape to provide superior support for joints and pressure points while remaining breathable with ThermaGel particles to keep the sleeping surface cool all night long. ThermaGel is a trademark of Leggett & Platt, Inc.

Brand: Serta


Color: Blue


Size: King 79"x75"


Fabric Type: 100% Memory Foam


Special Feature: Breathable, Cooling, Durable, Premium, Pressure Relief


Brand: Serta


Color: Blue


Size: King 79"x75"


Fabric Type: 100% Memory Foam


Special Feature: Breathable, Cooling, Durable, Premium, Pressure Relief


Closure Type: Blue


Product Care Instructions: Spot Clean Only


Water Resistance Level: Not Water Resistant


Age Range (Description): Adult


Material: Memory Foam


Model Name: ThermaGel


Number of Items: 1


Manufacturer: Elite Comfort Solutions


UPC: 094325278879


Product Dimensions: 3 x 75 x 79 inches


Item Weight: 21.8 pounds


Item model number: 12275


Date First Available: May 6, 2020


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Mar 18

Yes, absolutely! You may return this product for a full refund within 90 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Like sleeping on a cloud – a perfect refresh for my mattress! ⭐⭐⭐⭐⭐
Size: Full 74"x53" Item Display Height: 3 Inches
I bought this Serta ThermaGel topper (3-inch, Full size) to add some life to an older mattress that was starting to feel a bit too firm and lumpy. I wanted something that would offer pressure relief without making me overheat, and this has been a fantastic upgrade. Pros: Instant Comfort Upgrade: The 3-inch thickness is substantial. You definitely sink into it, but it feels supportive rather than just squishy. It significantly reduced the pressure points on my hips and shoulders. Cooling Effect: I tend to sleep hot, so I was hesitant about memory foam. However, the "ThermaGel" technology actually seems to work. It feels breathable and stays cooler than standard yellow foam toppers I've used in the past. Brand Quality: It’s nice to see it’s "Made in the USA." The foam feels dense and durable, not cheap or flaky. It expanded to its full shape pretty quickly after unboxing. No Slip: The texture of the foam seems to grip the mattress well enough that it doesn't slide around too much under the fitted sheet. Cons/Things to Note: Initial Smell: Like almost all memory foam products, it had a slight "new foam" smell right out of the box. I let it air out for about 24 hours before putting sheets on it, and the smell went away completely. Care: The instructions say "Spot Clean Only," so I highly recommend using a waterproof or thick mattress protector over it just to keep it clean, as you can't throw this in the washing machine. Verdict: If you aren't ready to buy a brand-new mattress but need better sleep quality, this is a very cost-effective solution. It turned a mediocre bed into a luxury feel. ... show more
Reviewed in the United States on December 2, 2025 by DPM
    • Great mattress topper!
Size: Queen 79"x59" Item Display Height: 3 Inches
The best sleep I've had was with this topper. I purchased it to go onto a Murphy bed that had a stiff spring mattress. It was soft and it was cooling which allowed me to sleep comfortably! I would absolutely recommend.
Reviewed in the United States on January 5, 2026 by Kenny B
    • Cooling Comfort That Works for Both Side & Back Sleepers
Size: Full 74"x53" Item Display Height: 2 Inches
As a side sleeper and with my wife being a back sleeper, this Serta ThermaGel 2" memory foam topper noticeably improved sleep quality for both of us. It adds just the right amount of pressure relief without feeling too soft, and the cooling gel actually helps prevent overheating. Easy upgrade that made our mattress much more comfortable—great balance of support and comfort. ... show more
Reviewed in the United States on January 7, 2026 by Joe
    • Good value, comfortable, but not cooling
Size: King 79"x75" Item Display Height: 2 Inches
Not sure it’s cooling but it is comfortable. There was no smell when I took it out of the box and we slept on it immediately. Good value but probably would try to find a cooling one next time if that actually exists.
Reviewed in the United States on December 15, 2025 by Crystal B
    • Great value Great topper!!
Size: King 79"x75" Item Display Height: 3 Inches
Review Image by TAMMY T TAMMY T
Review Image by TAMMY T TAMMY T
The media could not be loaded. EXACTLY what i wanted. My family bought me a similar Serta topper 5 yrs ago after a major surgery. My matress has seen better days. The first one was very comfortable and I was still using it but my large dog digs at the bed before laying down and did rip it. Honestly, the first one was a little too soft. I had a full open abdominal so those muscles were cut and I have bad joints , so sitting up can be tricky. I found you sink in and had to actually roll to get up. This Serta topper is much more comfortable & much easier to get up from because all though soft, it is firmer. It bounces right back after you get up. . It gives but doesn't make you sink. This helps sleeping when you have joint pain. I didnt feel as hot with it as much as the first either but could just be me. It came in a solid box ,( grandkids LOVE the box with the sheep and large flaps lol) compressed, well wrapped and in a duffle bag. It was fully expanded as soon as I opened it. I didnt notice any smells. This was the best sleep I've had in a long time and at this price I've considered buying an extra when it inevitably rips and wears down but I've read some reviews online that toppers didn't fully expanded after stored a long time. Ill just enjoy this till it dies and replace it then. It was very fast shipping also. I HIGHLY RECOMMEND THIS & WILL buy again! ... show more
Reviewed in the United States on September 27, 2025 by TAMMY T TAMMY T
    • Great quality mattress topper
Size: Queen 79"x59" Item Display Height: 2 Inches
We almost got a new mattress but decided to try this instead and so glad we did. It is so comfortable! Its exactly what we needed. It is comfy but sits it sits on top of a mattress, you do not sink down into it much. It really transforms the mattress. It came fast and in a box, so you have to open it up and let it sit and air out for a few hours, which is what I did. I got the Queen size and it fits exactly on the queen....meaning it does not go over the edge of the queen bed which would make it hard for a sheet to fit. I also ordered a new queen fitted sheet that has extra length for the fitting part at same time that fits it well. The sheet never pops off. Very happy with this purchase. ... show more
Reviewed in the United States on December 11, 2025 by Bethany

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