King Memory Foam Mattresses

4 king memory foam mattresses from Novilla, Nectar, Sweetnight and more. Prices run $450 to $2,799.

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.

Tempur-Pedic

King, Memory Foam, Medium, 11 to 12 in

+King size fits larger beds and two sleepers

+All memory foam construction

+Medium firmness suits many sleep preferences

$2,799.00-7%Was: ~~$2,999.00~~

as of 11/04/2026 05:39 PST - Details

Generic

King, Memory Foam, Medium, 8 to 10 in

+King size fits a large bed frame

+CertiPUR-US certified memory foam

+Cooling gel memory foam construction

−Thicker than an 8-inch mattress, which may need deeper sheets

No price recorded yet.

Casper

King, Memory Foam, Medium

$845.00

as of 11/03/2026 22:20 PST - Details

Sweetnight

King, Memory Foam, Medium, 11 to 12 in

+Cooling feature listed for warmer sleepers

+CertiPUR-US certified foam

+5-zone ergonomic support design

$449.99

as of 11/04/2026 05:36 PST - Details

Compare specs

Size	Type	Firmness	Thickness	Spec score	Price
King	Memory Foam	Medium	11 to 12 in	n/a	$2,799.00 as of 11/04/2026 05:39 PST - Details
King	Memory Foam	Medium	8 to 10 in	n/a	No current price
King	Memory Foam	Medium		n/a	$845.00 as of 11/03/2026 22:20 PST - Details
King	Memory Foam	Medium	11 to 12 in	n/a	$449.99 as of 11/04/2026 05:36 PST - Details

Spec scores, pros and cons, and prices are explained in the How it works section of the About page.