Cyber Monday Firm Full Size Mattresses Sale

Shop Cyber Monday firm full size mattresses to compare available options designed for a firmer feel across a range of brands, materials and price points. Review product details, customer ratings and delivery options to find the right fit for your sleep preferences and space.

Sleepy's Basic Innerspring Firm Mattress

8758

Starting at

$249⁹⁹

Firm Comfort, best for

Back, Stomach Sleepers
Temperature
Pain
Bed Partner
Allergies
Toss and Turn

Sleepy's Rest Firm 2.0 Innerspring Mattress

7039

Starting at

$449⁹⁹

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

Stearns & Foster Estate 14.5" Firm Mattress

1865

Starting at

$2249⁰⁰

$2449⁰⁰

$200 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Allergies
Toss and Turn

$300 Instant Gift⁴ with purchase of a mattress set.

Tulo Bamboo 6" Firm Green Tea Memory Foam Mattress

5604

Starting at

$199⁹⁹

$559⁹⁹

$360 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

Nectar Classic 12" Firm Memory Foam Mattress

245

Starting at

$599⁰⁰

$949⁰⁰

$350 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

Sealy Essentials Spruce 5.5" Firm Mattress

1373

Starting at

$424⁹⁹

$699⁹⁹

$275 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Temperature
Bed Partner
Toss and Turn

Tempur-Pedic TEMPUR-ProAdapt 2.0 12" Firm Mattress

5191

Starting at

$3149⁰⁰

$3349⁰⁰

$200 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Allergies
Bed Partner
Toss and Turn
Temperature

$300 Instant Gift⁴ with purchase of a mattress set + Calm app 3-month free trial.

Beautyrest Black Series Three 15" Firm Mattress

2312

Starting at

$3129⁰⁰

$3729⁰⁰

$600 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

$300 ⁶ adjustable base instant gift with purchase.

Purple RestorePlus 13" Firm Hybrid Mattress

1668

Starting at

$3099⁰⁰

$3499⁰⁰

$400 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Allergies
Bed Partner
Toss and Turn
Temperature

Beautyrest BR800 Greenwood 10.5" Firm Mattress

3413

Starting at

$419⁹⁹

$949⁹⁹

$530 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Bed Partner
Toss and Turn
Temperature
Pain

Stearns & Foster Estate 15" Firm Euro Pillow Top Mattress

2818

Starting at

$2449⁰⁰

$2649⁰⁰

$200 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Allergies
Toss and Turn

$300 Instant Gift⁴ with purchase of a mattress set.

Sleepy's Hybrid Clearance 11" Firm Mattress

1581

Starting at

$399⁹⁹

$1519⁹⁹

$1120 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Temperature
Toss and Turn
Pain

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sleepy's By Sealy Spring Firm Mattress

1402

Starting at

$1399⁹⁹

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Toss and Turn
Temperature

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest BR800 Greenwood 11.25" Firm Mattress

1723

Starting at

$469⁹⁹

$959⁹⁹

$490 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Bed Partner
Toss and Turn
Temperature
Pain

FREE ADJUSTABLE BASE ³ with code ELEVATE

Dreamcloud PressureSmart Technology Firm Mattress

1056

Starting at

$899⁰⁰

$1499⁰⁰

$600 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sealy Posturepedic Elite Albany II 14" Firm Mattress

907

Starting at

$1649⁰⁰

$1749⁰⁰

$100 OFF

Firm Comfort, best for

Back Sleepers
Pain
Temperature
Allergies
Bed Partner
Toss and Turn

$200 Instant Gift⁴ with purchase of a mattress set.

Cyber Monday firm full size mattresses bring together a supportive feel and a space-conscious footprint, making them a practical choice for bedrooms that need room for more than a bed. A standard full size mattress measures approximately 54 inches wide by 75 inches long, offering a single sleeper more room to stretch than a twin without taking up as much floor space as a queen. That balance works well in a teenager’s bedroom, a first apartment or a guest room where a dresser, desk and overnight bag still need a place. Picture a bedroom with a reading lamp beside the bed and enough open floor space to get dressed without squeezing past furniture: a full can help preserve that everyday comfort. A firm mattress generally feels less yielding at the surface, although the amount of cushioning varies by construction. Some have a gently padded top over a sturdy support system; others offer a more immediate, buoyant feel with little initial sink. Firm does not have to mean bare or uninviting, and a quilted cover or thin comfort layer can soften the first impression without creating a deeply enveloping sensation. For Cyber Monday shopping, the useful comparison is not price alone but how the mattress’s dimensions, materials and feel fit the person who will use it. An affordable option for occasional guests may serve a different purpose than a mattress intended for nightly use through years of school or apartment living. Compare the listed price for the full size specifically, since prices shown for another size may differ, and account for any foundation, delivery or setup costs that apply. Product descriptions can help clarify mattress height, comfort layers and support construction before you narrow your choices. Seasonal pricing and availability can vary, so the individual listing is the best place to confirm the purchase details rather than assuming every firm full mattress has the same features or terms.

The most useful distinction when choosing a firm full size mattress is the difference between firmness and support. Firmness describes how the surface feels when you lie down, while support comes from the mattress’s ability to distribute your weight and help maintain comfortable alignment. A firmer surface may appeal to back sleepers who prefer less sinking around the hips or stomach sleepers who find a deeply cushioned surface uncomfortable. Side sleepers often need more give around the shoulders and hips, so a firm mattress with some contouring may feel better than one with minimal cushioning. Body weight matters, too: the same mattress can feel quite firm to a lighter person and more yielding to someone who applies greater pressure to its comfort layers. Think about the first few minutes of settling into bed, but also the way you move overnight. If you regularly roll from your back to your side, ease of movement may matter as much as the initial feel. Foam designs can provide close contouring and reduce the transfer of movement, while innerspring designs often have a more responsive feel. Hybrid mattresses combine coils with comfort layers, though their firmness, bounce and cushioning still vary considerably. No construction automatically guarantees a particular experience, and firmness labels are not standardized across every mattress. Look at the description of the complete design rather than relying on a single material or a firmness name. Edge support deserves attention if you sit on the side to pull on socks or tend to sleep near the perimeter. Temperature comfort is another consideration, especially for someone who likes a substantial comforter during the cooler months but tends to wake feeling warm. Breathable covers and airflow through the mattress may help, but sheets, protectors, room temperature and bedding also affect the sleep environment. A firm mattress is a comfort preference, not a promised solution for pain, so choose according to your needs rather than assuming the hardest surface is always the best.

A full size mattress is usually most comfortable for one adult, but it can also make sense for a growing teen or a guest bedroom used by individual visitors. Two adults can share a full, although its width leaves less personal space than a queen, and its 75-inch length may feel limiting for taller sleepers. If the room will regularly accommodate two people or you want more length, compare Cyber Monday firm queen size mattresses; a standard queen measures approximately 60 inches wide by 80 inches long. Before choosing either size, measure the room with the bed frame included, not just the mattress footprint, and leave space for doors, drawers and comfortable movement beside the bed. Check the route into the bedroom as well, particularly in homes with narrow stairways or tight corners. A taller mattress can change how easy it feels to sit down or get out of bed, and the combined height of the mattress and base matters more than either measurement alone. Confirm that your existing frame or foundation meets the mattress’s stated requirements, including any slat-spacing rules, and check compatibility before pairing it with an adjustable base. Full size sheets should match the mattress depth, while a properly fitted protector helps keep the sleep surface clean without bunching beneath you. If the mattress is a gift for someone moving into a first home or updating a childhood bedroom, involve the recipient in choosing the feel; a supportive surprise is most useful when it suits the way they actually sleep. For a guest room, think about who visits most often rather than trying to find one firmness that everyone will love. Before completing a Cyber Monday purchase, review delivery arrangements, packaging details, any available old-mattress removal and the stated trial, return and warranty terms. Those practical details help turn a promising selection into a bed that fits the room, the budget and the nightly routine, from reading beneath a blanket to stretching out after a long day.

What are firm mattresses made of? + -

Firm mattresses may include innerspring coils, foam layers, TEMPUR-Material™, latex or a combination of materials. The construction can vary by model, so review the product details to understand the layers and cover.

How do I choose a firm mattress for Cyber Monday? + -

Consider the mattress materials, construction, preferred firmness feel and compatibility with your existing bed frame or foundation. Comparing these features can help you narrow down your options during the Cyber Monday event.

Can I use a mattress topper on a firm mattress? + -

Yes, a mattress topper can be placed on a firm mattress to add a different feel. Choose a topper based on its material, thickness and care instructions.

What type of foundation works with a firm mattress? + -

Many firm mattresses are compatible with a platform bed, adjustable base, box spring or other foundation approved by the manufacturer. Check the mattress specifications for foundation requirements before setting it up.

How should I care for a firm mattress? + -

Use a properly supported foundation, rotate the mattress if the manufacturer recommends it and protect the surface with a compatible mattress protector. Follow the care instructions provided with the mattress.