--- product_id: 216537469 title: "Serta ThermaGel 3-Inch Gel Memory Foam Mattress Topper, King" brand: "serta" price: "$1676.03" currency: USD in_stock: true category: "Serta" url: https://www.desertcart.us/products/216537469-serta-thermagel-3-inch-gel-memory-foam-mattress-topper-king store_origin: US region: United States of America --- # Deep pressure relief for hips & back 3-inch cooling gel memory foam Full King size 79x75 inches Serta ThermaGel 3-Inch Gel Memory Foam Mattress Topper, King **Brand:** serta **Price:** $1676.03 **Availability:** ✅ In Stock ## Summary > ❄️ Sleep Cooler, Feel Better — Upgrade Your King Bed Comfort Tonight! ## Quick Answers - **What is this?** Serta ThermaGel 3-Inch Gel Memory Foam Mattress Topper, King by serta - **How much does it cost?** $1676.03 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/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 - • **Perfect for Couples:** Generous King size and breathable design keep both partners cool and comfortable, no matter the sleep style. - • **Stay Cool All Night:** ThermaGel-infused foam actively dissipates heat for a refreshing sleep surface across your entire King bed. - • **Extend Mattress Life:** Softens firm or aging mattresses, saving you replacement costs while upgrading comfort instantly. - • **Certified Safe & Durable:** Made in the USA with CertiPUR-US certified foam, ensuring low VOC emissions and long-lasting quality. - • **Ultimate Pressure Relief:** 3 inches of contouring memory foam cushions hips, shoulders, and lower back to ease pain and promote restorative rest. ## 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 fit standard King frames, it softens firm mattresses and extends their lifespan while providing breathable, CertiPUR-US certified foam made in the USA. Ideal for couples and hot sleepers seeking cooler, more restorative nights. ## 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." ## 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 | |---------------|-------| | ASIN | B0889898S8 | | Age Range Description | Adult | | Best Sellers Rank | #9,368 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #38 in Mattresses Toppers | | Brand | Serta | | Brand Name | Serta | | Closure Type | Pull On | | Color | Blue | | Customer Reviews | 4.3 out of 5 stars 10,596 Reviews | | Fabric Type | 100% Memory Foam | | Item Display Dimensions | 3 inches | | Item Firmness Description | Soft | | Item Type Name | Serta ThermaGel Memory Foam Mattress Topper | | Manufacturer | Elite Comfort Solutions | | Manufacturer Part Number | 12275 | | Material Type | Memory Foam | | Model Name | ThermaGel | | Model Number | 12275 | | Number of Items | 1 | | 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 | | UPC | 094325278879 | | Unit Count | 1.0 Count | | 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 ## 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.us/products/216537469-serta-thermagel-3-inch-gel-memory-foam-mattress-topper-king](https://www.desertcart.us/products/216537469-serta-thermagel-3-inch-gel-memory-foam-mattress-topper-king) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-16*