Amazon King Size Bed Mattresses on Sale (Best Sellers)


If you are in search of a mattress and want to save, check this list with Amazon king size bed mattresses on sale picked from their best selling items of this type.

So all the mattresses are at discount prices, in some cases you will see huge differences from the original and discount price. But bear in mind also that those are their best-selling products so you have plenty of reports by users and there should be no unpleasant surprises when you order such an item.

Yet another great benefit here is that those are Amazon Prime products, and you will see this indicated with the mattresses in the list. So if you are not using this benefit, this might be the right time for it. You can have such a huge mattress shipped for free and within a day or two depending on your location.

The sizes are what you would expect from a king-size bed, the mattresses are built to fit the size 76 x 80 inches (193 x 203 cm). But always check to be sure because some of them could be imported from manufacturers abroad, there are some differences around the globe when it comes to the meaning of the term king-size bed. In case you need something smaller, check our separate list with queen size mattresses.

Regarding the materials and construction, you have them in various thicknesses and some are multi-layered constructions for optimal support. Memory foam is typically used or a gel-infused variant of it, and inside many of them have spring coils.

To put your mind at rest, you might want to go for those that offer certificates by CertiPUR-US which deals with the foam used in the construction, and Oeko-Tex Standard 100 which is about harmful substances like formaldehyde, mercury, and other heavy metals. You will see some with statements about mattresses meeting CFR1633 Standard which is about flammability issues.

Buying such an item is an investment and you might want to protect it, we have a separate list with mattress protectors. Note also that we have a separate list with king-size bed frames.

So here is our list with Amazon king size bed mattresses on sale, please have a look. There will be new items added occasionally so bookmark this text and check again for new deals and discounts:

SaleBestseller No. 1
Olee Sleep 13 inch Galaxy Hybrid Gel Infused Memory Foam and Pocket Spring Mattress (King)
19,498 Reviews
Olee Sleep 13 inch Galaxy Hybrid Gel Infused Memory Foam and Pocket Spring Mattress (King)
  • General Note: Please allow 24 - 72 hours for your mattress to regain its full shape. Any memory foam will expand faster in a warmer room. In cold temperature, at delivery, your mattress may take a bit longer to return to full sized from its compressed state. The expansion time of the mattress will vary as per the surrounding.
  • Composed of 5 layers includes pocket spring. Memory foam adapt to your body shape and temperature
  • Gel infused memory foam regulates temperature while conforming to the body to ease pressure points
  • To ensure that this mattress lasts many years, its coils are protected by multi HD and memory foam layers which add to unparalleled quality and incredible comfort.
  • 10 year limited manufacturer warranty
SaleBestseller No. 2
ZINUS 12 Inch Green Tea Cooling Gel Memory Foam Mattress / Cooling Gel Foam / Pressure Relieving / CertiPUR-US Certified / Bed-in-a-Box, King
62,238 Reviews
ZINUS 12 Inch Green Tea Cooling Gel Memory Foam Mattress / Cooling Gel Foam / Pressure Relieving / CertiPUR-US Certified / Bed-in-a-Box, King
  • AS COOL AS IT GETS - Settle in to a bed made with our most cooling formula yet, promising perfectly temperature-regulated sleep and a clean feeling night after night, all thanks to our enveloping memory foam packed with cooling gel and green tea
  • PRESSURE-RELIEVING FOAMS – Layers of ultra-cooling gel and green tea infused memory foam, soft comfort foam and durable, high density base foam
  • CERTIPUR US CERTIFIED - Highest quality foam is CertiPUR US Certified for durability, performance, and content
  • EXPERTLY PACKAGED - Our technology allows this mattress to be efficiently compressed into one box that’s easily shipped and maneuvered into the bedroom; simply unbox, unroll and this mattress does the rest, expanding to its original shape within 72 hours
  • Worry-free 10 year limited warranty included; twin mattress supports a maximum weight of 250 lbs, while all other sizes can support up to 500 lbs
SaleBestseller No. 3
Olee Sleep 10 inch Aquarius Memory Foam Mattress - King
15,086 Reviews
Olee Sleep 10 inch Aquarius Memory Foam Mattress - King
  • General note: please allow 24 - 72 hours for your mattress to regain its full shape. Any memory foam will expand faster in a warmer room. In cold temperature, at delivery, your mattress may take a bit longer to return to full sized from its compressed state. The expansion time of the mattress will vary as per the surrounding.
  • Perfect top layer supports bodyweight & maintains body shape for rest in the best condition. 1 inch 8 ILD soft memory foam supports body with soft power.
  • Perfect top layer supports bodyweight & maintains body shape for rest in the best condition. 1 inch 8 ILD soft memory foam supports body with soft power.
  • 1 inch I Gel disperses temperature accumulation to maintain a constant mattress temperature.
  • Our patented technology allows our mattresses to be efficiently compressed, rolled and shipped in a box conveniently to your door. Please allow the mattress 72 hours to expand for the best results.
SaleBestseller No. 4
Classic Brands Cool Gel Ventilated Memory Foam 12-Inch Mattress | CertiPUR-US Certified | Bed-in-a-Box, King
13,423 Reviews
Classic Brands Cool Gel Ventilated Memory Foam 12-Inch Mattress | CertiPUR-US Certified | Bed-in-a-Box, King
  • General Note: Please allow 24 to 72 hours for your Mattress to regain its full shape. Any memory foam will expand faster in a warmer room. In cold temperature, at delivery, your mattress may take a bit longer to return to full sized from its compressed state.The expansion time of the mattress will vary as per the surrounding.
  • 76" W x 80" L x 12" H,The latest in sleep technology, cool gel memory foam layer for temperature regulation with layers of ventilated egg crate foam for breathability layered on high-density base foam for maximum comfort and support
  • Beautifully detailed waterfall edge cover with four way stretch top and charcoal gray knit sides works with the memory foam to optimize its conforming properties
  • High-quality memory foam conforms to your body while the cool gel regulates body temperature; porous, open cell design allows for a greater circulation and meets CertiPUR-US program standards for performance, emissions, and durability
  • Medium-Plush Feel and Adjustable Base Friendly; 10 Year Warranty
SaleBestseller No. 5
FONTOI King Size Mattress in a Box, 10 inch Bed Mattresses Made in USA with Breathable Bamboo Cover, Cooling Gel Green Tea Memory Foam, Medium Firm (10IN-MDR-King)
28 Reviews
FONTOI King Size Mattress in a Box, 10 inch Bed Mattresses Made in USA with Breathable Bamboo Cover, Cooling Gel Green Tea Memory Foam, Medium Firm (10IN-MDR-King)
  • Breathable Bamboo Cover - all of the items are wrapped in a thick, temperature-regulating bamboo knit cover that can be easily removed and cleaned. The bamboo fabric absorbs moisture, dries quickly, and helps the body breathe. Have a comfortable and refreshing night's sleep without waking up from overheating.
  • Medium-Firm Feel - designed as the perfect alternative to those who prefer a firm, yet not too rigid, sleeping experience, the medium-firm comfort has an ideal level of cushioning to ensure a restful slumber for back and stomach sleepers or combination sleepers, making it the perfect choice both kids and adults with differing sleep patterns.
  • CertiPUR-US Certified - all foam used in our mattresses are made without ozone depleters and maintain CertiPUR-US Safety Standards of textile articles at all stages of production. It will have minimal off-gassing, or “new mattress” smell when brought into your home.
  • Fiberglass-Free FR Inner Cover - no negative aspects of fiberglass and other fire-retardant chemicals. No skin irritation, no breathing problems, and no health risks for you and your family — so you can truly rest easy at night.
  • 10-Year Warranty - We’re in the business of having your back, so you can stay in the business of getting great sleep.
SaleBestseller No. 6
King Mattress,IYEE NATURE 10 Inch King Size Hybrid Mattress Individual Pocket Springs with Foam,King Bed in a Box with Breathable and Pressure Relief,Medium Plush,Bule
1,047 Reviews
King Mattress,IYEE NATURE 10 Inch King Size Hybrid Mattress Individual Pocket Springs with Foam,King Bed in a Box with Breathable and Pressure Relief,Medium Plush,Bule
  • STAY A NIGHT SLEEP TIGHT:IYEE NATURE innerspring mattresses queen has designed open cells and high density foam so that it can freely adjust temperature to make for a comfortable sleep.
  • PREVENT HUMAN INTERFERENCE: Due to the pocket spring and foams design, this mattress can effectively absorb noise and vibration; No more getting woken up caused by tossing and turning, no disturbing your companion.
  • DESIGNED FOR ALL SLEEPER TYPES:IYEE NATURE mattress that works for all the sleeping types. With foam and a medium soft core support system to provide each sleeping position a good amount of support.
  • INDIVIDUAL POCKET SPRING: Support system constructed by hundreds of individual pocketed stainless steel spring coils that are excellent for shock-absorption and resilience and help adjust and sleep easier and harder.
  • HASSLE FREE FOR RETURN: You can enjoy a comfortable sleep with the purchase of our mattresses every night which. Included is a 10-year service warranty and 31-days return policy. If you have any dissatisfactory problems, please don't hesitate to contact us.
SaleBestseller No. 7
King Mattress, Molblly 12 inch Gel Memory Foam Mattress with CertiPUR-US Bed Mattress in a Box for Sleep Cooler & Pressure Relief, King Size
11,848 Reviews
King Mattress, Molblly 12 inch Gel Memory Foam Mattress with CertiPUR-US Bed Mattress in a Box for Sleep Cooler & Pressure Relief, King Size
  • Molblly 12 inch Gel Memory Foam Mattress is designed with three layers all-foam system, improving support and heat dissipation, mattress layers include 3 inches memory foam, 3.5 inches of comfortable layer, and 5.5 inches of high density base support foam for ultimate comfort.
  • The memory foam mattress meets the CertiPUR - US Certified for performance, emissions, and durability, the high quality cover can brings you the luxury you crave.
  • All-foam bed design combined expertise and the best materials with advanced sleep technology. Memory foam conducive to continuous airflow & breathable; skin-friendly fabrics adapt to the environment to keep the mattress surface at the ideal sleeping temperature; Buoyant, no-sink support foams adapt and conform to your body for optimal pressure relief; Specialized foams reduce motion transfer of a partner so your sleep is undisturbed.
  • Molblly mattress is compressed, rolled, and shipped in a box for simple setup; easily fits through narrow hallways and staircases. They fit all frames, such as box spring, floor, slatted base, flat platform or adjustable bed.
  • Molblly bed mattress comes with a 10-year warranty and 30-days money-back return policy. With our professional customer service team, we help deal with any dissatisfaction problems. If for any reason you are unsatisfied, contact us at any time for support. NOTE: Mattress is recommended 72 hours for air out and reshape.
SaleBestseller No. 8
King Mattress, Rimensy 12 Inch Hybrid Mattress in a Box, Gel Foam Mattress, Individually Wrapped Pocket Coils Innerspring Mattress, Support & Pressure Relief, Medium Firm Feel, 76'*80'*12'
668 Reviews
King Mattress, Rimensy 12 Inch Hybrid Mattress in a Box, Gel Foam Mattress, Individually Wrapped Pocket Coils Innerspring Mattress, Support & Pressure Relief, Medium Firm Feel, 76"*80"*12"
  • SLEEP SOUNDLY - Rimensy 12 inch king size mattress combines the innerspring wrapped coils with the cooling gel memory foam for an optimal sleep experience. The pressure-relieving foam cradles your body shape so you awake free of aches and pains and fresh as a daisy.
  • COOL TO SLEEP ON - The cooling gel particles, air-flow between coils and the hypoallergenic fabrics maintain a comfortable climate all night, making this twin bed more breathable. 
  • ISOLATED MOTION - The individually pocketed coils provide enough support for proper spinal alignment and absorb motion disturbance between partners, allowing your deep sleep not to be disturded.
  • KING SIZE BED IN A BOX - Measures 76" W x 80" D x 12" H and supports a maximum weight of 700 lbs. It is compatible with most twin bed frames, such as box spring, floor, slatted base, flat platform or adjustable bed, hospital bed.
  • WORRY-FREE - This medium firm mattresses come with a 10-year warranty. We recommend 72 hours for your new mattress to return to its full shape. Keep enough distance to the mattress when unwrappeing,as it may have a risk to smack people when expanding.For assistance with any problems you may have, please contact our customer support team.

Last update on 2022-09-10  / Affiliate links / Images from Amazon Product Advertising API


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