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10 Best firm mattress in a box kings of 2025
Save up to 28% 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% Off9.8Exceptional
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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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Customer Reviews:N/A
9.7Exceptional
Our Rating
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3
AyeawoAyeawo Firm King Size Mattress, 14 Inch Hybrid King Bed Mattress with Gel Memory Foam and Pocket Springs for Pressure Relief & Motion Isolation, Bed in a Box, Breathable & Cooling Feel, CertiPUR-US
9.6Exceptional
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4
BEDinglyBEDingly King Size Mattress, 14 Inch Luxury Hybrid King Mattress in a Box, Medium Firm Mattresses with Cooling Gel Memory Foam & Pocket Springs, Double Additional Support, 365-Night Trial
10% Off9.4Excellent
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5
LoadEaseLoadEase King Size Mattress,12 Inch King Mattress in a Box for Back Pain Relief, Upgrade Memory Foam and Pocket Coils Spring, Medium Firm, Excellent Motion Isolation, Edge Support, 80x76x12
28% Off9.3Excellent
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6
EEN EEN SLEEPKing Size Mattress [Upgraded Strengthen] 14 Inch Firm King Mattress in a Box, Hybrid Mattresses With Gel Memory Foam & Independent Pocket Springs, Release Stress, Strong Edge Support,365-Night Trial
9.2Excellent
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7
SleepmaxSleepmax Extra Firm King Mattress 12 Inch - Deep Sleep Hybrid Mattress for Back & Side Sleepers - Pressure Relief No Sagging Bed in a Box - Fiberglass-Free, CertiPUR-US Certified, 365-Night Trial
9.0Excellent
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8
LETMOONLETMOON King Size Mattress, 14 Inch Hybrid King Mattress in a Box, Medium Firm Memory Foam and Pocket Springs, Strong Edge Support, Pressure Relief
16% Off8.9Very Good
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9
RRESTARRESTA Firm King Mattress 14 Inch - Hotel Collection Hybrid Mattress with 5-Zone Support, Luxury Sleep Comfort, Extra Back & Hip Support, Fiberglass-Free, CertiPUR-US Certified, 365-Night Trial
10% Off8.7Very Good
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10
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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Customer Reviews:N/A
8.6Very Good
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