medium-firm king mattress best sellers

#1 King Mattress Famistar King Mattress, Famistar 14 Inch Memory Foam Mattress King Size, Innerspring Hybrid King Bed Mattress in a Box Medium Firm with Motion Isolation & Strong Support & Pressure Relief, CertiPUR-US

$269.99 on Walmart

#2 King Mattress 12 Inch Deegari King Mattress,12 Inch King Size Mattress in a Box,Gel Memory Foam and Innerspring Hybrid Mattress with Individual Pocket Spring for Motion Isolation,Pressure Relief,Medium Firm Feel

$259.99 on Amazon

#3 King Mattress Nisien King Mattress,Nisien 14 Inch Hybrid Mattress in a Box, Gel Foam Mattress, Individually Wrapped Pocket Coils Innerspring Mattress, Support & Pressure Relief, Medium Firm Feel, 76"*80"*14"

$359.99 on Walmart

#4 12 inch California King 12 inch California King Size Mattress with Cover, Cooling Gel Memory Foam King Mattress for a Cool Sleep & Pressure Relief, Medium Firm Mattress Pad Mattresses, Bed in a Box, CertiPUR-US Certified

$110.99 on Walmart

#5 Soges Mattress 12 inch Soges Mattress 12 inch Hybrid Mattress King Size, Individual Pocket Spring Bed Mattress, Medium Firm Mattress for Pressure Relief, Strong Edge Support, CertiPUR-US

$91.99 on Walmart

#6 🔥 King Size Mattress 10 LETMOON King Size Mattress, 10 Inch Hybrid King Mattress in a Box, Medium Firm Memory Foam and Pocket Springs, 3 Coils Strong Edge Support, Pressure Relief

$239.99 on Amazon

#7 🔥 King Mattress in a Box King Mattress in a Box, 14in Memory Foam Mattress, Motion Isolation, Zoned Pressure Relief, Cooling & Breathable, Gel Infused, Medium Firm Feel, CertiPUR-US Certified

$269.99 on Walmart

#8 🔥 🆕 King Size Mattress 14 DIFAME King Size Mattress, 14 Inch King Hybrid Mattress in a Box with Memory Foam, Upgraded Strengthen Individually Pocket Spring for Motion Isolation, Pressure Relief, Edge Support, Medium Firm

$436.77 on Amazon

#9 Crystli 12" Hybrid King Crystli 12" Hybrid King Mattress Memory Foam Mattress with Wrapped Innersprings Medium Firm Bed-in-a-Box CertiPUR-US Certified King Mattresses

$139.99 on Walmart

#10 🔥 4 Inch King (72" x 80") FoamRush 4-Inch King (72" x 80") Mattress Cooling Gel Memory Foam RV Mattress Replacement with Cotton Cover, Medium Firm, Comfort, Pressure Relief Support, Made in USA, Travel Camper Trailer Truck

$349.97 on Amazon

#11 🔥 🆕 King Mattress 12 Inch SWEDREA King Mattress, 12 Inch Medium Firm Hybrid Mattress with Bamboo Charcoal Gel Memory Foam and Pocketed Springs, King Size Mattress in a Box with Pressure Relief and Support, CertiPUR-US Certified

$299.99 on Amazon

#12 Soges 10" Memory Foam Soges 10" Memory Foam Mattress King Size Mattress Medium Firm Pocket Spring Bed Mattress, CertiPUR-US

$99.99 on Walmart

#13 12 inch King Hybrid of 12 inch King Hybrid of Gel Memory Foam Mattress for Cool Sleep & Pressure Relief, Medium Firm Mattresses Bed-in-a-Box/Pressure Relieving

$229.99 on Walmart

#14 🔥 Michigantown 14" Hybrid ALWYN HOME Michigantown 14" Hybrid King Size Mattress in a Box, Memory Foam & Pocket Spring Medium Firm Mattress

$369.99 on Wayfair

#15 🔥 🆕 10 Inch Short King RV WEUP 10 Inch Short King RV Mattress with Tencel Cover, Premier Cooling Green Tea/Gel Memory Foam Mattress, Medium Firm Bed Mattresses in Box for Camper/Truck/Trailer, Made in US, CertiPUR-US, 75'' x 72''

$399.99 on Amazon

#16 12in King Size 2 Layer BEST CHOICE PRODUCTS 12in King Size 2-Layer Medium-Firm Charcoal Gel & Green Tea Infused Memory Foam Mattress

$379.99 on Wayfair

#17 King Size Mattress 12 IYEE NATURE King Size Mattress, 12 Inch Cooling-Gel Memory Foam Mattress Bed in a Box, 80”*76”*12”, CertiPUR-US Certified, Medium Firm, Grey - King

$179.99 on Amazon

#18 King Mattress 12 Inch Molblly King Mattress, 12 Inch Cooling-Gel Memory Foam and Individually Pocket Innerspring Hybrid Mattress, King Bed Mattress in a Box, CertiPUR-US Certified,76”*80”, Medium Firm King Size Mattress

$179.99 on Amazon

#19 King Mattress 12 Inch Rimensy King Mattress, 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"

$279.99 on Amazon

#20 King Mattress 12 Inch JINGWEI King Mattress, 12 Inch Innerspring Hybrid Mattress in a Box, Individually Pocket Coils for Motion Isolation & Cool Sleep, King Bed for Back Pain, Medium Firm, King Size Mattress

$209.99 on Amazon