Serta Perfect Day 7 inch firm mattress in a box on a modern blue bed frame for supportive sleep. White quilted surface of the Serta Perfect Day 7 inch firm mattress providing breathable comfort. Interior pocketed coil support system of the Serta Perfect Day 7 inch firm mattress in a box. Close-up of the quilted top and Serta brand label on the 7 inch firm mattress for back support. Serta Perfect Day 7 inch firm mattress in a box styled in a contemporary navy blue bedroom. High-quality Serta Perfect Day 7 inch firm mattress in a box with a durable quilted white surface. Side sleeper demonstration showing spinal alignment on the Serta Perfect Day firm pocketed coil mattress. Infographic of Serta Perfect Day mattress layers including cooling surface and durable coil support.
Serta Perfect Day 7" Firm Mattress in a Box
Ultra Soft Soft Medium Soft Medium Medium Firm Firm Extra Firm

Serta Perfect Day 7" Firm Mattress in a Box

$279.00
$549.00
Save $270.00
Brand: Serta
Size
Best for Stomach sleepers
i Size Guide
$279.00
Only 13 left in stock
Free Shipping Free Shipping
10-Year Limited Warranty 10-Year Limited Warranty

To begin with, the Serta 7 Inch Mattress in a Box slips easily through tight halls and stairways, making it a smart space-saving sleep solution for apartments, guest rooms, and bunk beds. 

Next, a quilted breathable knit mattress cover welcomes you with a cool, smooth feel, while PillowSoft Aire Foam delivers pressure-relieving foam layers that cushion without sacrificing firmness. 

Beneath the foam, a durable coil support system holds your spine level, providing the reliable lift that earns this bed its firm twin mattress in a box reputation. Because of this balanced design, it suits growing kids, overnight guests, and anyone who prefers a supportive surface. 

Finally, Cloudy Mattress lets you buy a Serta 7-inch mattress online with free shipping in the USA and quick 1–2 week delivery, all at a budget-friendly sleep experience price point of just $149 for a Twin.

Firm Support for Alignment

Stable feel helps back, and stomach sleepers keep a healthy posture.

PillowSoft Aire Foam Comfort

Air-channel foam eases pressure so you wake with fewer aches.

Innerspring Coil Durability

Reinforced coils add bounce and resist sag for years of steady comfort.

Breathable Cooling Surface

Ventilated quilt promotes airflow for a fresher night’s sleep.

Compact 7″ Profile

Low height fits bunk beds, trundles, and tight spaces with ease.

Ships Rolled & Ready

Mattress-in-a-box design makes setup quick and easy in the bedroom furniture.

Key Mattress Benefits

Serta Perfect Day 7" Firm Mattress in a Box

3 Layers
Of Cooling
Comfort

Soft knit fabric encourages airflow to keep the surface cool and comfortable.

Air-blown foam layer cushions pressure points while retaining a firm feel for proper support.

Hundreds of durable coils provide consistent lift and reduce sag, extending the mattress's life span.

Serta Perfect Day 7" Firm Mattress in a Box
Serta Perfect Day 7" Firm Mattress in a Box Serta Perfect Day 7" Firm Mattress in a Box
CLOUDY MATTRESS IS THE SMARTER CHOICE
DISCOVER WHY BUYING WITH

CLOUDY MATTRESS IS THE SMARTER CHOICE

From better sleep support to trusted quality, Cloudy Mattress gives you more value for your money.

SHIPPING

FASTEST SHIPPING

Get your new mattress delivered quicker than ever with our priority nationwide shipping. No long waits, comfort arrives right at your door step, fast.

CUSTOMER SUPPORT

24 / 7 CUSTOMER SUPPORT

Whether its day or night, our dedicated team is always available to answer questions, resolve issues, and guide you through every step.

GUIDANCE

EXPERT GUIDANCE

Not sure which mattress suits you best? our sleep experts are here to help you choose the perfect option tailored to your comfort, health and lifestyle needs.

GUARANTEED

BEST PRICE GUARANTEED

Shop with confidence knowing you're getting the best value. If you find a better deal, we'll matach it, guaranteed.

WE'VE GOT ANSWERS
HAVE QUESTIONS?

WE'VE GOT ANSWERS

Designed for deep comfort and better rest, so you wake up refreshed and ready for the day

Yes. Its firm feel and coil core support most back and stomach sleepers up to average weight, though very heavy sleepers may prefer a thicker model.

The 7-inch low profile fits safely within most bunk-bed guard rails. Always check your bed’s rail height to ensure at least 5 inches of safety rail remains above the mattress surface.

It reaches usable firmness within a few hours, but allows up to 24 hours for the foam and quilt to fully recover their shape.

No. Any solid platform, slatted frame with gaps under 3 inches, or bunkie board will support it. A traditional box spring is optional.

The Comfort rating on Cloudy Mattress lists it as Firm Comfort, giving a solid, supportive feel without an overly hard surface.

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+1 800 540 9851

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