Top 10 Firm Mattress King – Mattresses

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1. Signature Design by Ashley

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King, CertiPUR-US Certified, Signature Design by Ashley Chime 12 Inch Medium Firm Memory Foam Mattress

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Signature Design by Ashley #ad - Plush support: thick layers of memory foam contour to your body and deliver amazing support, pressure relief and comfort for all types of sleepers. Buy with confidence: designed and manufactured by Ashley Furniture Industries. The trusted source for stylish furniture, lighting, rugs, accessories and mattresses.

Direct from the manufacturer: Ashley Furniture goes the extra mile to package, protect and deliver your purchase in a timely manner. Quick expansion: mattress is safe to sleep on immediately but can take 72 plus hours for any residual odors from packaging to dissipate and for mattress to completely expand based on ambient room temperature, humidity, air pressure & ventilation. Memory foam mattress: for sound sleep you've always dreamed of. Bed foundation, box spring and frame available, sold separately.

12" profile: designed with layers of memory foam for support and pressure relief, all with a comfortable feel. King size: measures 71" w x 79" d x 12" h and is compatible with most king bed frames. Ready for instant enjoyment: Arrives in a box. For every taste and budget. This body contouring memory foam mattress delivers amazing support, pressure relief and comfort. The support foam core reduces motion transfer for peaceful, undisturbed sleep.
BrandSignature Design by Ashley #ad
ManufacturerAshley Furniture #ad
Height12 Inches
Length74 Inches
Width75 Inches
Part NumberM72741
ModelM72741

2. Zinus

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ZINUS 12 Inch Support Plus Pocket Spring Hybrid Mattress / Extra Firm Feel / Heavier Coils for Durable Support / Pocket Innersprings for Motion Isolation / Mattress-in-a-Box, King

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Zinus #ad - Supportive foam & pocket springs - soft comfort foam, durable high-density foam and motion-isolating independent pocket springs with a quilted jacquard cover offer a firm feel that’s perfect for stomach sleepers and those who enjoy a very firm mattress.

Certipur us certified - highest quality foam is CertiPUR-US Certified for durability, performance, and content. Firm support, plus more - our firmest mattress ever is engineered with heavier gauge steel independent pocket innersprings for added stability and extra firmness, ideal for stomach sleepers and plus-sized individuals. 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.
BrandZinus #ad
ManufacturerZinus #ad
Height12 Inches
Length80 Inches
Weight108.82 Pounds
Width76 Inches
Part NumberAZ-PPSM-12K
ModelAZ-PPSM-12K

3. Zinus

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Zinus 10 Inch Green Tea Memory Foam Mattress / CertiPUR-US Certified / Bed-in-a-Box / Pressure Relieving, King

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Zinus #ad - 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. Certipur us certified - highest quality foam is CertiPUR US Certified for durability, performance, and content.

The right combination - our special recipe for rejuvenating rest? Refreshing green tea and moisture-absorbing ActivCharcoal infused into pressure-relieving memory foam that cradles your shape so you awake free of aches and pains and fresh as a daisy. Pressure-relieving foams - 2. 5 inches conforming memory foam, and 5. 5 inches durable, airflow enhancing comfort foam, 2 inches soft, high density base support foam; ideal for side sleepers and petite to average-weight sleepers.

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.
BrandZinus #ad
ManufacturerZinus #ad
Height10 Inches
Length80 Inches
Weight67.33 Pounds
Width76 Inches
Part NumberAZ-BTCM-10K
ModelAZ-BTCM-10K

4. Classic Brands

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Classic Brands Cool Gel Memory Foam 14-Inch Mattress with 2 BONUS Pillows | CertiPUR-US Certified | Bed-in-a-Box, King

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Classic Brands #ad - 76" w x 80" l x 14" H. Beautifully tailored and detailed with a stretch knit fabric cover with waterfall edge and matching knit side panels. Gel infused ventilated memory foam creates a plush and comfortable sleeping surface for a more restful night's sleep; high-density base foam relieves pressure points and conforms to your body, and provides unparalleled support during the night.

Premium pressure-relieving memory foam and high-density aerated cool gel memory foam are combined together to provide the essential support and comfort for a deeper night's sleep.

Bonus 2-shredded memory Foam Standard Pillows FREE. Medium-plush feel with firm Support and Adjustable Base Friendly; 10 Year Warranty. High-quality memory foam conforms to your body while the cool gel regulates body temperature; porous, emissions, open cell design allows for a greater circulation and meets CertiPUR-US program standards for performance, and durability.
BrandClassic Brands #ad
ManufacturerClassic Brands #ad
Height14 Inches
Length80 Inches
Weight94 Pounds
Width76 Inches
Part Number410167-1160
Model410167-1160
Warranty10 year warranty.

5. Avenco

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Grey, Edge Support, Excellent Support, CertiPUR-US & ISPA, Pocketed Innerspring and Gel Memory Foam, King Mattress, 10 Inch Hybrid King Mattress in a Box, Avenco King Size Mattress Firm

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Avenco #ad - Finished with a warp knitting fabric cover, this luxurious king mattress is compressed and smartly delivered in a box for convenient setup. Please allow this foam mattress king 24-72 hours to expand its full size. Sizes are subject to ± 05 inch. The high-resilience memory foam mattress also helps you maintain a proper sleeping position and distributes your weight from head to toe evenly throughout the mattress.

This pocket coil king mattress is a four-layer structure that maintains spinal health. Unparalleled support - the premium memory foam can adapt to the natural curve of the human body and adjust deformation. All foam is certipUR-US for a safe and healthy sleeping environment. The high elasticity of the surface is the characteristic, you can sleep more comfortably. High-density foam perfectly conforms to your body and provides support during the night.

Use "breathable material" with high ventilation, wrapping, and breath-ability of the side of this king memory foam mattress. High-quality materials & more comfortable - the excellent warp knitting technology improves the abrasion resistance, the rebound is just right. Buy with confidence - you have 100 nights trial and covered with avenco 10 years of support. Motion isolation - the parallel arrangement of pocket coils is adopted. When you sleep with your lover, it will not interfere with your sleep.
BrandAvenco #ad
ManufacturerAvenco #ad
Height10 Inches
Length80 Inches
Weight96 Pounds
Width76 Inches
Part NumberTHCD-003
ModelTHCD-003
Warranty10 years manufacturer warranty.

6. Olee Sleep

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Olee Sleep 13 inch Galaxy Hybrid Gel Infused Memory Foam and Pocket Spring Mattress King

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Olee Sleep #ad - Gel infused memory foam regulates temperature while conforming to the body to ease pressure points. 10 year limited Manufacture warranty. Memory foam adapt to your body shape and temperature. Composed of 5 layers includes pocket spring. 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.
BrandOlee Sleep #ad
ManufacturerGrantec co.,LTD #ad
Height13 Inches
Length80 Inches
Weight106.56 Pounds
Width76 Inches
Part NumberOLR13SM01K
ModelOLR13SM01K
Warranty10years limited manufacturer warranty.

7. Avenco

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Edge Support and Back Pain Relief, 5 Zone Pocket Innerspring and Memory Foam, CertiPUR-US, 100 Nights Trial, King Size Mattress, 10 Inch Hybrid King Mattress in a Box, Avenco King Mattress Firm

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Avenco #ad - The pocket spring structure greatly reduces the impact of user actions such as turning over and getting up at night on the sleeping partner. The king mattress in a box is easy to carry even on narrow roads and stairs. You will feel pressure relief on this hybrid mattress king size and farewell to back pain.

5-zone design for better support: this 10 inch firm mattress king is ergonomically divided into 5 zones to achieve ideal body adaptation and support. Sleep safe with avenco mattress memory foam: the high quality knitted fabrics of this king size memory foam mattress is gentle on the skin and has excellent moisture absorption. It can provide support from head to toe, no matter what direction you are lying in. Our king size mattresses are vacuum-sealed and smartly rolled up in a box. 100 nights trial: we offer 100 nights sleep trial and 10 years of support to our customers.

Please wait 72 hours until the king size bed mattress is fully expanded. The pocket spring system provides firm support for your entire body. Approved by certipur-us, our foam is checked without harmful substances and is suitable for all people. Peaceful sleep with motion isolation: each spring of mattress king size is individually packaged, so each spring can work independently without worrying about collapse. Foam layers give you sleep comfort by slowly adapting to your body.
BrandAvenco #ad
ManufacturerAvenco #ad
Height10 Inches
Length80 Inches
Weight115 Pounds
Width76 Inches
Part NumberTHCD-001
ModelTHCD-001
Warranty10 years manufacturer warranty.

8. Novilla

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12 inch Gel Memory Foam King Mattress for a Cool Sleep & Pressure Relief, Novilla King Size Mattress, Medium Firm Feel with Motion Isolating, Bliss

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Novilla #ad - Also to resist sagging and prevent roll-off. King mattress in a box & fits all bed frames- such fun to receive a mattress that’s rolled and compressed in a box. With our professional customer care, we help deal with any dissatisfaction problems. Hassle free for return & refund- mattresses are covered by a 10-year limit and 30-days money-back return policy.

You can enjoy this king memory foam mattress without concerns while you are following your dream. The foam mattress on top is a gel-infused memory foam that keeps you cool. Mattresses’ quality cover with Bamboo fabrics also enhance 30% breath-ability. Removable bed mattress cover use skin-friendly rayon fabric, mercury, heavenly soft to touch. The egg crate designed foam layer increases airflow through all areas of this king size memory foam mattress. Cool & highly breathable- novilla king size mattress constructed with a 4-layer all-foam system.

Ensures you stay asleep longer with this bed mattress. Gel memory foam is combined with comfort foam to distribute pressure and mold to your body. Mattress is recommended 72 hours for air out and reshape. Whether you sleep alone or next to a partner, there is no disruption. A safe & comfortable sleep environment- mattress is made of certipur-us certified foam, without any harmful off-gassing and substances like formaldehyde, and other heavy metals.
BrandNovilla #ad
ManufacturerNovilla #ad
Height12 Inches
Length76 Inches
Width80 Inches
Part NumberNV0M801-12-K
ModelNV0M801-12-K

9. LUCID

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LUCID 10 Inch Memory Foam Firm Feel – Gel Infusion – Hypoallergenic Bamboo Charcoal – Breathable Cover Bed Mattress Conventional, King

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LUCID #ad - Compressed, rolled, and shipped in a box for simple setup; easily fits through narrow hallways and staircases. This mattress features a 10-inch FIRM feel ideal for side, back, and stomach sleepers that crave more support and less sink.

The 2. 5-inch ventilated gel memory foam top layer creates a cooler sleep experience than traditional memory foam by helping to regulate body temperature and increase circulation. Gel infused memory foam regulates temperature while conforming to the body to ease pressure points. We only use certipur uS certified memory foam to ensure your uncompromising safety and comfort. Dimensions: 76" x 80" x 10". 1 inch of transition foam and 6. 5 inches of dense bamboo charcoal infused support foam provide extra stability and full body support.
BrandLUCID #ad
ManufacturerLUCID #ad
Height10 Inches
Length80 Inches
Weight58.5 Pounds
Width76 Inches
Part NumberLU10KKFR30GF
ModelLU10KKFR30GF
Warranty10 year warranty.

10. Linenspa

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White, Linenspa 8 Inch Memory Foam and Innerspring Hybrid Medium-Firm Feel-King Mattress

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Linenspa #ad - Available in a medium firm 8 inch profile, a medium 10 inch profile, or a plush 12 inch profile that also features gel infusions and individually encased coils.

Packaging process may leave small brown flecks called carbons in the mattress packaging; These carbons are harmless pieces of plastic and will not stick to your mattress; 10 year limited warranty. 8 inch hybrid mattress combine hypallergenic memory foam with the traditional support of an innerspring mattress for a medium-firm feel perfect for kids rooms, guest beds, or an affordable low-profile option. Finished with a cozy knit cover, this mattress is compressed as a bed in a box for convenient delivery and setup. A plush layer of memory foam helps align the spine to minimize pressure points for increased comfort.
BrandLinenspa #ad
ManufacturerLinenspa #ad
Height8 Inches
Length80 Inches
Weight70 Pounds
Width76 Inches
Part NumberLS08KKMFSP
ModelLS08KKMFSP
Warranty10-year manufacturer's warranty.