King, Memory Foam, Medium Firm, 13 in and up
King Memory Foam Mattresses
10 king memory foam mattresses from Novilla, Nectar, Sweetnight and more. Most cost $446 to $1,695, and half cost less than $479.
King mattresses whose title says memory foam: foam throughout, no coils.
We do not pick by hand: a mattress is here because its listed specs pass the checks.
+King size fits two sleepers comfortably
+CertiPUR-US certified foam
+AiryFlow cooling system for cooler sleep
$467.48-15%List: $549.99
as of 11/04/2026 00:28 PST - DetailsProduct details
Novilla 14 Inch King Mattress, King Size Memory Foam Mattress | with AiryFlow Cooling System for Cool Night, Pressure
$467.48as of 11/04/2026 00:28 PST - Details
View on AmazonPros
+King size fits two sleepers comfortably
+CertiPUR-US certified foam
+AiryFlow cooling system for cooler sleep
+Medium firm support for most sleepers
+Thick build at 13 inches or more
How pros and cons are picked (About: Disclaimer)About this product
King, Memory Foam, Medium Firm, 11 to 12 in
+Full 12 inch thickness for deep support
+CertiPUR-US certified memory foam
+Copper gel infused foam
−Medium firm feel may not suit those wanting softer support
$489.99
as of 11/04/2026 18:36 PST - DetailsProduct details
EGOHOME King 12 inch Memory Foam Mattress for Back Pain Relief Medium Firm | Fiberglass Free, Copper Gel Infused,
$489.99as of 11/04/2026 18:36 PST - Details
View on AmazonPros
+Full 12 inch thickness for deep support
+CertiPUR-US certified memory foam
+Copper gel infused foam
+Fiberglass free construction
+King size fits two sleepers
Cons−Medium firm feel may not suit those wanting softer support
Compared with the 10 mattresses on this page−Cooling not listed: 23 of the 33 here list one
How pros and cons are picked (About: Disclaimer)About this product
King, Memory Foam, Medium Firm, 8 to 10 in
+King size for wide sleeping space
+Charcoal infused memory foam
+Cooling feature for a cooler sleep surface
−Under 10 inches thick, thinner than some memory foam options
No price recorded yet.
Product details
2 Charcoal Infused Memory Foam Califonia King Mattress 8 Inch, Medium Firm Califonia King Size Bed Mattress withNo price recorded yet.View on Amazon
Pros
+King size for wide sleeping space
+Charcoal infused memory foam
+Cooling feature for a cooler sleep surface
+Medium firm feel for balanced support
Cons−Under 10 inches thick, thinner than some memory foam options
How pros and cons are picked (About: Disclaimer)About this product
King, Memory Foam, Medium Firm, 13 in and up
+King size for larger bedrooms and couples
+Split King option for adjustable bases
+Contouring memory foam construction
−Heavy king size is difficult to move alone
$3,036.00
as of 11/04/2026 00:21 PST - DetailsProduct details
Nectar 13" Memory Foam Mattress & Adjustable Base, Medium Firm, Split King | Contouring Memory Foam, Cooling Top Layer,
$3,036.00as of 11/04/2026 00:21 PST - Details
View on AmazonPros
+King size for larger bedrooms and couples
+Split King option for adjustable bases
+Contouring memory foam construction
+Medium firm feel
+13 inch profile
Cons−Heavy king size is difficult to move alone
How pros and cons are picked (About: Disclaimer)About this product
King, Memory Foam, Medium Firm, 11 to 12 in
+CertiPUR-US certified foam
+King size gives room for two sleepers
+Medium firm feel suits back and stomach sleepers
−Memory foam can trap heat compared with hybrid designs
$1,695.00
as of 11/04/2026 14:42 PST - DetailsProduct details
Casper Sleep Original 11" Memory Foam King Mattress – Medium Firm Feel | Breathable Memory Foam, Zoned Support, Motion
$1,695.00as of 11/04/2026 14:42 PST - Details
View on AmazonPros
+CertiPUR-US certified foam
+King size gives room for two sleepers
+Medium firm feel suits back and stomach sleepers
+Zoned support targets different body areas
+Memory foam limits motion transfer between partners
Cons−Memory foam can trap heat compared with hybrid designs
Compared with the 10 mattresses on this page−Cooling not listed: 23 of the 33 here list one
How pros and cons are picked (About: Disclaimer)About this product
King, Memory Foam, Medium Firm, 8 to 10 in
+King size fits two sleepers or a larger frame
+Memory foam conforms to the body
+Charcoal infusion with cooling feature
−Memory foam can trap heat unless cooling feature works
No price recorded yet.
Product details
2 Charcoal Infused Memory Foam King Mattress 8 Inch, Medium Firm King Size Bed Mattress with Washable Cover for KingNo price recorded yet.View on Amazon
Pros
+King size fits two sleepers or a larger frame
+Memory foam conforms to the body
+Charcoal infusion with cooling feature
+Medium firm feel for a balanced surface
+8 to 10 inch thickness
Cons−Memory foam can trap heat unless cooling feature works
How pros and cons are picked (About: Disclaimer)About this product
King, Memory Foam, Medium Firm, 11 to 12 in
$299.99
as of 11/04/2026 18:36 PST - DetailsProduct details
EGOHOME King Size Memory Foam Mattress 12 Inch, Green Tea, Medium Firm | Bed Mattress in A Box, Cooling Green Tea Gel,
$299.99as of 11/04/2026 18:36 PST - Details
View on AmazonAbout this product
King, Memory Foam, Medium Firm, 11 to 12 in
−Cooling not listed: 23 of the 33 here list one
$449.99
as of 11/04/2026 02:41 PST - DetailsProduct details
Signature Design by Ashley 12 Inch King Memory Foam Mattress in a Box | Medium Firm comfort with a 12-inch profile and
$449.99as of 11/04/2026 02:41 PST - Details
View on AmazonCompared with the 10 mattresses on this pageCons
−Cooling not listed: 23 of the 33 here list one
How pros and cons are picked (About: Disclaimer)About this product
King, Memory Foam, Medium Firm, 11 to 12 in
$445.88
as of 11/04/2026 00:28 PST - DetailsProduct details
Novilla AiryFlow 12 Inch King Mattress, King Size Gel Memory Foam Mattress | for Cool Night & Spinal Alignment,
$445.88as of 11/04/2026 00:28 PST - Details
View on AmazonAbout this product
King, Memory Foam, Medium Firm, 13 in and up
$599.99
as of 11/04/2026 00:28 PST - DetailsProduct details
Novilla AiryFlow Graphene 14 Inch King Size Mattress, Cooling Memory Foam | Medium Firm Mattress, Thermal Balance
$599.99as of 11/04/2026 00:28 PST - Details
View on AmazonAbout this product
Compare specs
| mattress | Size | Type | Firmness | Thickness | Spec score | Price |
|---|---|---|---|---|---|---|
| King | Memory Foam | Medium Firm | 13 in and up | n/a | $467.48 as of 11/04/2026 00:28 PST - Details | |
| King | Memory Foam | Medium Firm | 11 to 12 in | n/a | $489.99 as of 11/04/2026 18:36 PST - Details | |
| King | Memory Foam | Medium Firm | 8 to 10 in | n/a | No current price | |
| King | Memory Foam | Medium Firm | 13 in and up | n/a | $3,036.00 as of 11/04/2026 00:21 PST - Details | |
| King | Memory Foam | Medium Firm | 11 to 12 in | n/a | $1,695.00 as of 11/04/2026 14:42 PST - Details | |
| King | Memory Foam | Medium Firm | 8 to 10 in | n/a | No current price | |
| King | Memory Foam | Medium Firm | 11 to 12 in | n/a | $299.99 as of 11/04/2026 18:36 PST - Details | |
| King | Memory Foam | Medium Firm | 11 to 12 in | n/a | $449.99 as of 11/04/2026 02:41 PST - Details | |
| King | Memory Foam | Medium Firm | 11 to 12 in | n/a | $445.88 as of 11/04/2026 00:28 PST - Details | |
| King | Memory Foam | Medium Firm | 13 in and up | n/a | $599.99 as of 11/04/2026 00:28 PST - Details |
Before you buy
- Mattress Types and Thickness, Explained
- Mattress Firmness Labels, Explained
- Mattress Firm Return Policy and Sleep Trial
- Sam's Club Shipping and Delivery, Explained
- Wayfair Financing and Credit Card, Explained
- Wayfair Rewards Membership, Explained
- IKEA Financing and Credit Cards, Explained
- Mattress Firm Price Match, Explained









