Serta iComfort CF4000 Firm Mattress

Call for the best deals and expert mattress advice!


Sleep City is one of the largest mattress web dealers in the country specializing in luxury products at the best price. Call 877-246-7533 to speak with our knowledgeable staff to get the best mattress advice in the industry. We will provide you with the best price and service available. We monitor our competition to ensure the best prices in the country.

Serta iComfort CF4000 Firm Mattress

Experience Luxurious cooling comfort at a price that can’t be beaten. Serta has created this New iComfort foam mattress collection with highly advanced materials that focus on cooling, contouring, and supporting. The New Serta iComfort CF4000 Firm mattress has a very neutral feel that will meet a large variety of sleep needs and comfort preferences. It is firm enough for back sleepers, yet soft enough for most side sleepers. For couples who have different preferences, this mattress will make a great choice.

The Serta iComfort CF4000 Firm Mattress features Serta’s most advanced materials focusing on keeping you cool. Layers of Carbon Fiber Memory Foam and the Ultracold System work together to pull heat away from your body, keeping your body at an ideal sleeping temperature. Multiple contouring layers conform, support, and relieve aches and pains caused by pressure points. This superior mattress is one of the coolest and most supportive iComfort models yet.

Key Features of the Serta iComfort CF4000 Firm Mattress:

Max Cool Cover – This cover is made from super cool high-performance fibers that are designed to provide an instant cool-to-the-touch feel to prevent you from overheating at night. A cool sleeping environment helps you fall asleep faster and stay asleep longer without interruptions.

UltraCold System – An extra cool Carbon Fiber Memory Foam layer mixed with Phase Change Material works to absorb excess heat from your body, then dissipates that heat away so, you can sleep comfortably all night long.

Carbon Fiber Memory Foam – Made specifically for the New Serta iComfort foam mattresses, this exclusive foam features carbon fiber memory foam mixed with Phase Change Material (PCM). This foam is designed to draw heat away from your body and provide incredible support and pressure relief for your entire body.

Deep Reaction Max Memory Foam – Is a firm deep cushioning foam that conforms to the curves of your body, providing substantial pressure relief.

Serta Support Foam – Is an extra firm foam that gives this mattress a firm yet comfortable supportive feeling.

Air Support Foam – This unique support layer features air-cushion technology that contours the curvatures of your body and moves with it to mitigate aches and pains caused by pressure points.

Serta Foam Core – The foam core is incredibly durable and provides excellent support throughout the entire mattress while providing exceptional body contouring.

Adjustable Base Friendly

10 Year Warranty 

Dimensions 13.5 cm

10 Year

Support System

Air Support Foam, Serta Foam Core


Max Cool Cover, UltraCold System

Mattress Height


Comfort Layer

Carbon Fiber Memory Foam, Deep Reaction Max Memory Foam, Serta Support Foam


Coupon Code:

Coupon Code: SLEEPCITY
Asset 10

Free Delivery

Every product, everyday! You'll enjoy, stress-free delivery!

Learn More

Asset 11

Love Your Bed Guarantee

Our experts are here to help you every step of the way.

Learn More

Asset 13

Low Price Guarantee

Sleep soundly knowing you can try your mattress in the comfort of your home.

Learn More

Asset 12

No Sales Tax

Up to 72 months with no interest, we've got your perfect financing option.

Learn More