--- product_id: 216537469 title: "Serta ThermaGel 3-Inch Gel Memory Foam Mattress Topper, King" brand: "serta" price: "1440662CFA" currency: XOF in_stock: true reviews_count: 13 category: "Serta" url: https://www.desertcart.sn/products/216537469-serta-thermagel-3-inch-gel-memory-foam-mattress-topper-king store_origin: SN region: Senegal --- # Deep pressure relief & contouring 3-inch cooling gel memory foam King size 79x75 inches Serta ThermaGel 3-Inch Gel Memory Foam Mattress Topper, King **Brand:** serta **Price:** 1440662CFA **Availability:** ✅ In Stock ## Summary > ❄️ Sleep Cooler, Feel Better — Upgrade Your King Comfort Tonight! ## Quick Answers - **What is this?** Serta ThermaGel 3-Inch Gel Memory Foam Mattress Topper, King by serta - **How much does it cost?** 1440662CFA with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/216537469-serta-thermagel-3-inch-gel-memory-foam-mattress-topper-king) ## Best For - serta enthusiasts ## Why This Product - Trusted serta brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Stay Cool All Night ❄️:** ThermaGel-infused foam actively dissipates heat across the entire King bed, perfect for hot sleepers and couples. - • **Pressure-Relief Perfection 💪:** 3 inches of plush memory foam contours to hips, shoulders, and lower back for targeted pain relief and restorative sleep. - • **Certified Safe & Durable 🇺🇸:** Made in the USA with CertiPUR-US certified foam, ensuring low VOC emissions and long-lasting comfort. - • **Upgrade Without Replacement 🛏️:** Softens firm or aging mattresses, extending their life and saving you the cost of a new bed. - • **Effortless Fit & Breathability 🌬️:** Ventilated design supports airflow and fits standard King frames, platform beds, and adjustable bases seamlessly. ## Overview The Serta ThermaGel 3-Inch Gel Memory Foam Mattress Topper for King beds combines advanced cooling gel technology with deep pressure-relieving memory foam. Designed to keep couples and hot sleepers comfortable, it softens firm mattresses while providing targeted support to key pressure points. Made in the USA with CertiPUR-US certified foam, this breathable, durable topper fits standard King frames and adjustable bases, delivering a premium sleep upgrade without the expense of a new mattress. ## Description "Sleeping hot or dealing with pressure discomfort on your King mattress? The Serta ThermaGel 3-Inch King Gel Memory Foam Mattress Topper delivers targeted cooling and deep pressure relief across the full width of your bed. The ThermaGel-infused foam actively dissipates body heat to keep the sleep surface cooler and more comfortable throughout the night , a meaningful benefit for couples or single sleepers who tend to sleep warm. At 3 inches, the topper conforms precisely to the body's natural curves, cushioning the hips, lower back, and shoulders for back pain relief, deeper plush feel, and more restorative sleep across the full King width. Ventilated, breathable construction supports airflow for all sleep positions. Made in the USA with CertiPUR-US certified foam for trusted safety, durability, and low emissions. Softens a firm or aging King mattress and extends its useful life. Designed for standard King bed frames, platform beds, and adjustable bases, this thick mattress topper layers seamlessly under existing bedding with no additional setup required. Upgrade your King bed today. Add to cart and experience cooling, pressure-relieving comfort from Serta ThermaGel. ThermaGel is a trademark of Leggett & Platt, Inc." Review: Queen that's bigger than a King - ***Edit 05/09*** I realized after rolling and stuffing the topper back into its original box that the topper I received was for a California King. Make sure before you open this thing the sticker reads the size you purchased. Now I will say I received a replacement the very next day and I was able to sleep on it last night. I am changing my 2 🌟 review to a 5 🌟 because of how quickly they replaced it and being able to sleep on it, it was really comfy and I slept so well. My bed is 9 years old but there isn't anything wrong with it, it's just not as comfortable anymore. My boyfriend always complained My bed was too hard and made his back hurt and he said he slept so much better on this 3" mattress topper. This mattress topper is humongous. I ordered a Queen and once it fluffed out it measured way larger than the Queen measurements listed. It's like 85×75. It measures larger than the King sized measurements. It looks ridiculous on my bed and I would have to fold it over the edges or cut the foam for it to fit properly. I'm going to attempt to fold and roll this thing back up to send it off for a smaller size. I will say when I laid on it with the sheets it did feel soft and cool. Fingers crossed the full sized bed isn't too small. Review: Doesn't seem to run hot! - Package arrived on time and was well packed. We removed it from paking and removed shipping plastic, then allowed it expand per the instructions. It had no offensive odor at all; in fact it was a pleasant smell if anything. The next day we placed it onto our mattress (it was easy to placeand it stays in place well), put the sheets on, and at bedtime we climbed in. The topper provided an excellent mixture of softness and support. It has not run hot at night and is very pleasant to sleep upon. It appears to be a very durable topper. ## Features - 100% Memory Foam - STOP SLEEPING HOT ACROSS YOUR FULL KING BED: Cooling gel-infused memory foam pulls body heat from the entire King sleep surface all night , a meaningful benefit for couples or hot sleepers. ThermaGel cooling dissipates heat. - DEEP PRESSURE RELIEF: 3 inches of contouring memory foam delivers deep plush feel and substantial cushioning at the hips, shoulders, and lower back across the full King width for back pain relief and restorative sleep. - SOFTENS A FIRM OR AGING KING MATTRESS: This thick gel memory foam mattress topper conforms closely to the body and extends the life of an older King mattress, without replacement cost. - BUILT TO TRUST: CertiPUR-US certified foam, made in the USA, with ventilated, breathable design. Tested for low VOC emissions, durability, and content safety. Sized 75 x 79 inches for standard King bed frames, platform beds, and adjustable bases. - IDEAL FOR PRIMARY BEDROOMS WHERE BOTH PARTNERS NEED COOLER, DEEPER COMFORT: A reliable thick King mattress topper for couples. Pair under a standard fitted sheet. Add to cart and experience the comfort tonight. ## Technical Specifications | Specification | Value | |---------------|-------| | Brand | Serta | | Closure Type | Pull On | | Color | Blue | | Fabric Type | 100% Memory Foam | | Item Display Dimensions | 3 inches | | Material Type | Memory Foam | | Other Special Features of the Product | Breathable, Cooling, Durable, Premium, Pressure Relief | | Product Care Instructions | Spot Clean Only | | Size | King 79"x75" | | Special Feature | Breathable, Cooling, Durable, Premium, Pressure Relief | | Water Resistance Level | Not Water Resistant | ## Product Details - **Brand:** Serta - **Color:** Blue - **Size:** King - **Fabric Type:** 100% Memory Foam - **Special Feature:** Cooling, Durable, Premium, Pressure Relief, Breathable ## Images ![Serta ThermaGel 3-Inch Gel Memory Foam Mattress Topper, King - Image 1](https://m.media-amazon.com/images/I/919fn1VWB+L.jpg) ![Serta ThermaGel 3-Inch Gel Memory Foam Mattress Topper, King - Image 2](https://m.media-amazon.com/images/I/71jsSPpKDpL.jpg) ![Serta ThermaGel 3-Inch Gel Memory Foam Mattress Topper, King - Image 3](https://m.media-amazon.com/images/I/71vPqyyrxJL.jpg) ![Serta ThermaGel 3-Inch Gel Memory Foam Mattress Topper, King - Image 4](https://m.media-amazon.com/images/I/71kB5qC9PaL.jpg) ![Serta ThermaGel 3-Inch Gel Memory Foam Mattress Topper, King - Image 5](https://m.media-amazon.com/images/I/71eU9Y35grL.jpg) ## Available Options This product comes in different **Size, Set** options. ## Questions & Answers **Q: Will the quality depreciate over time and is there a warranty on this topper?** A: We have tested our products over a 10 year cycle and don't see any significant degradation of the product. Our Serta toppers don't have a specific warranty, but we have partnered with Amazon to replace the product or refund your purchase if you are not happy with the performance. **Q: Why is this $100 but the same model at kohls $400?** A: I just got the one sold at Kohls after returning this one. On sale from $400 for $174 online. This isn’t the same product. The Khols mattress topper is much heavier, comes with a cover and the packaging was much better. **Q: i sleep cold, will this keep me warm?** A: Actually, just received ours 2 days ago. I slept on it last night. It was very comfortable and my back never felt better but it was HOT! I sleep cold too. **Q: Is this certipur-us certified?** A: yes. All Serta products certipur-us certified. Check this link https://www.serta.com/standards ## Customer Reviews ### ⭐⭐⭐⭐⭐ Queen that's bigger than a King *by A***Y on May 7, 2026* ***Edit 05/09*** I realized after rolling and stuffing the topper back into its original box that the topper I received was for a California King. Make sure before you open this thing the sticker reads the size you purchased. Now I will say I received a replacement the very next day and I was able to sleep on it last night. I am changing my 2 🌟 review to a 5 🌟 because of how quickly they replaced it and being able to sleep on it, it was really comfy and I slept so well. My bed is 9 years old but there isn't anything wrong with it, it's just not as comfortable anymore. My boyfriend always complained My bed was too hard and made his back hurt and he said he slept so much better on this 3" mattress topper. This mattress topper is humongous. I ordered a Queen and once it fluffed out it measured way larger than the Queen measurements listed. It's like 85×75. It measures larger than the King sized measurements. It looks ridiculous on my bed and I would have to fold it over the edges or cut the foam for it to fit properly. I'm going to attempt to fold and roll this thing back up to send it off for a smaller size. I will say when I laid on it with the sheets it did feel soft and cool. Fingers crossed the full sized bed isn't too small. ### ⭐⭐⭐⭐⭐ Doesn't seem to run hot! *by M***I on June 15, 2026* Package arrived on time and was well packed. We removed it from paking and removed shipping plastic, then allowed it expand per the instructions. It had no offensive odor at all; in fact it was a pleasant smell if anything. The next day we placed it onto our mattress (it was easy to placeand it stays in place well), put the sheets on, and at bedtime we climbed in. The topper provided an excellent mixture of softness and support. It has not run hot at night and is very pleasant to sleep upon. It appears to be a very durable topper. ### ⭐⭐⭐⭐⭐ Like sleeping on a cloud – a perfect refresh for my mattress! ⭐⭐⭐⭐⭐ *by D***M on December 2, 2025* 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. ## Frequently Bought Together - Serta ThermaGel Cooling, Pressure-Relieving Memory Foam Mattress Topper, 3 Inch, King,Blue - SafeRest 100% Waterproof King Size Mattress Protector - Fitted with Stretchable Pockets - Machine Washable Cotton Mattress Cover for Bed - EASELAND King Size Mattress Pad Pillow Top Mattress Cover Quilted Fitted Mattress Protector Cotton 8-21" Deep Pocket Cooling Topper (78x80 Inches, White) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sn/products/216537469-serta-thermagel-3-inch-gel-memory-foam-mattress-topper-king](https://www.desertcart.sn/products/216537469-serta-thermagel-3-inch-gel-memory-foam-mattress-topper-king) --- *Product available on Desertcart Senegal* *Store origin: SN* *Last updated: 2026-08-14*