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10 Best firm mattress kings of 2025
Save up to 35% off
Best Choice1
SleepmaxSleepmax King Mattress 14 Inch - Firm Hotel-Collection Hybrid Mattress Pain Relief - Extra Lumbar & Hip Support - Deep Sleep Bed in a Box Fiberglass-Free - 365-Night Trial CertiPUR-US Certified
21% Off9.7Exceptional
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Value for Money2
MLILYEGOHOME 14 inch Firm King Mattress, Memory Foam Mattress with Cooling Cover, Bed in a Box, CertiPUR-US Certified, Breathable and Supportive, Made in USA, 76''x80''x14'' Black
Key specs-
size:14 inches
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construction:Copper-Infused AEROFUSION
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fill material:Memory foam
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dimensions:80 x 76 x 14 inches
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top style:Cooling cover
9.6Exceptional
Our Rating
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3
![LETMOON King Size Mattress [New Version], 14 Inch Gel Memory Foam Hybrid Mattress King Bed in a Box, Pressure & Pain Relief, Medium Firm, CertiPUR-US, Individual Pocket Spring, Edge Support](https://d1ttb1lnpo2lvz.cloudfront.net/7e0a079/loader.svg)
LETMOONLETMOON King Size Mattress [New Version], 14 Inch Gel Memory Foam Hybrid Mattress King Bed in a Box, Pressure & Pain Relief, Medium Firm, CertiPUR-US, Individual Pocket Spring, Edge Support
20% Off9.5Excellent
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4
BedStoryBedStory Extra Firm King Mattress 14 Inch, Hotel Collection Hybrid Mattresses with Extra Lumbar & Shoulder Support Pain Relief,Fiberglass-Free 365-Night Trial
9.4Excellent
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5
ZinusZINUS 12 Inch King Green Tea Memory Foam Mattress [New Version], Fiberglass free, Medium Firm Feel, Zoned Pressure Relief, Certified Safe Foams & Fabric, Mattress in A Box
Key specs-
size:King
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construction:Zoned pressure relief
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fill material:Memory Foam
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dimensions:80 x 76 x 12 inches
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top style:N/A
9.3Excellent
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EEN EEN SLEEPEEN EEN SLEEP King Mattress, 14 Inch Hybrid Mattress in a Box, Memory Foam and Individual Pocket Springs, Innerspring Medium Firm for Pressure Relief, Edge Support, Comfy and Breathable, CertiPUR-US
9.2Excellent
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7
NovillaNovilla King Size Mattress, 12 Inch Gel Memory Foam King Mattress for Cool Night & Pressure Relief, Medium Plush Feel with Motion Isolating, Bliss
Key specs-
size:King
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construction:4-layer all-foam system
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fill material:Memory foam
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dimensions:80 x 76 x 12 inches
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top style:Gel-infused memory foam
9.1Excellent
Our Rating
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8
NovillaNovilla King Mattress, 12 Inch King Size Memory Foam Mattress with Comfort Foam for Pressure Relief & Cool Fresh Sleep, Removable Washable Cover,Mattresses in a Box,Medium Firm
Key specs-
size:King
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construction:2-layer foam system
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fill material:Memory foam
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dimensions:80 x 76 x 12 inches
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top style:Knitted fabric cover
8.8Very Good
Our Rating
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9
UniPonUniPon Firm King Mattress 14 Inch, Cooling Gel Hybrid Mattresses for Back Pain Relief Extra Lumbar Support Motion Isolation with 960+ Pocket Springs, Fiberglass-Free 365 Night Trial
35% Off8.7Very Good
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10
EEN EEN SLEEPEEN EEN SLEEP 12 Inch King Size Mattress, Firm King Mattress in A Box, Hybrid Mattresses with Gel Memory Foam & Pocket Springs, Zoned Pressure Relief, Upgrade Support, CertiPUR-US, 365-Night Trial
8.5Good
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