What Is The Best Firm Mattress?

The Big Fig Firm Mattress, hands down. It’s extra firm and actually built to support bigger bodies. With 50% more coils , high-density foam and THERMOGEL COOLING® Technology, it delivers real-deal comfort and support that lasts. Bonus: it comes in all the popular sizes, from twin to California king.

What Makes A Mattress Firm?

A mattress is firm because of its materials and construction—and Big Fig Firm doesn’t mess around. The Big Fig Firm, uses dense comfort layers that don’t compress easily, paired with a solid, supportive core underneath. The top layers are thinner and made from high-density foam that keeps you lifted, not sunken. Below that,individually wrapped steel coils create a stable, responsive foundation that spreads out your weight and keeps your spine aligned, especially if you sleep on your back or stomach. That combo of durable materials and smart design is exactly what gives Big Fig Firm its extra-firm feel—and why it outlasts whatever came before it.

Are Firm Mattresses Better?

It depends on how you sleep and what your body needs, but if you’re a back or stomach sleeper, or someone who needs real support that won’t sag over time, a firm mattress is a smart move. Firm mattresses help keep your spine aligned, especially if you tend to sleep flat. They also provide the kind of surface that holds you up instead of letting you sink, which is especially important for bigger bodies. Plus, they’re often more durable and stay supportive longer than softer options. Bottom line: if you’re tired of soft spots, sore mornings or mattresses that quit too soon, the Big Fig Firm might be best for you.

Is A Firm Mattress Good For Stomach Sleepers?

Absolutely. If you sleep on your stomach, a firm mattress is one of the best ways to keep your spine aligned and your lower back pain-free. Big Fig Firm is designed to stop your hips and stomach from sinking too deep, which is exactly what causes that uncomfortable arch in your back. The firmer surface keeps your body lifted and level, helping you stay in a healthier position all night long. Less sag, more support and way fewer “why does my back hurt?” mornings. If you’re not usually a fan of ultra-firm mattresses, check out the Big Fig Classic. Our sleepers find that the Classic is great for multi-position sleepers, including those that sleep on their stomachs that might need a bit more cushion.

Is A Firm Mattress Good For Back Pain?

Yes, especially when it’s built like the Big Fig Firm. While some sleepers may benefit from a medium-firm feel like the Big Fig Luxe, many people with back pain—particularly back and stomach sleepers—need the uncompromising support of a truly firm mattress. The Big Fig Firm combines ultra-dense foam layers with individually wrapped coils to keep your spine aligned, reduce pressure on your lower back and prevent sagging that can lead to pain over time. It’s extra firm by design—because back pain doesn’t stand a chance when your mattress actually shows up for you.

Are All The Big Fig Mattress Warranties The Same?

Yes! Each mattress—Big Fig Firm, Big Fig Classic and Big Fig Luxe—is backed by a Limited Lifetime Warranty. To explore all the details of what is included, visit our warranty page here.

What Cooling Features Does the Big Fig Firm Mattresses Have?

The Big Fig Firm has a quilted top layer that's infused with THERMOGEL COOLING® technology, which activates with moisture to help regulate body temperature and create a cool-to-the-touch feel right against your skin. So, if night sweats are part of your sleep story, this mattress helps keep things dry, breathable and seriously comfortable.

What Is The Best Firm Mattress That Won’t Sag?

That would be the Big Fig Firm. And we don’t just claim durability through the mattress construction—we prove it. In independent lab tests simulating 20 years of use with a 350-lb rolling weight, Big Fig showed virtually no sagging, with less than 0.2” of surface impression. It’s firm. It’s strong. And it’s built to stay that way.

How Does The Big Fig Firm Mattress Compare To A Foam Mattress?

Foam mattresses tend to fold under pressure (literally). They compress without pushing back, which can leave you sagging, stuck and unsupported. The Big Fig Firm is built to do the opposite, delivering extra-firm, no-sink support that keeps your body lifted and your spine aligned. If you’re tired of sinking into soft spots or waking up sore, Big Fig Firm is your upgrade. Foam can’t compete.

How Does The Big Fig Firm Mattress Feel?

Firm, supportive and totally solid — just like it should. The Big Fig Firm is our most supportive mattress, designed to keep you lifted, aligned and sleeping on top of the surface instead of sinking in. It’s stable, even, provides that extra-firm feel back and stomach sleepers love—and stays that way. Looking for a soft, sink-in-and-disappear mattress? This isn’t it. But if you want real-deal support that won’t quit, Big Fig Firm is the one. Check out our mattress reviews to read more or try our 120-Day Sleep Trial to try Big Fig Firm for yourself!

Big Fig Firm Mattress - Split King

Stability and alignment? This firm mattress understood the assignment.

Supports up to 1,100 lbs (up to 550 lbs per sleeper) - For lots of body types
Ultra-Firm Support - This firm mattress holds strong with zero sag, sink or give thanks to 50% more coils than the average hybrid mattress.
THERMOGEL COOLING® Technology – Activates with body heat to combat night sweats

Select a size:

$2,249.00

Lifetime Warranty

Big Fig's 120 Nights Mattress Trial Is Unmatched

120 Night Sleep Trial

Big Fig's Mattresses Are Crafted In Cleveland.

Made In The USA

ADD A FRAME + FOUNDATION (OPTIONAL)

Do I need a foundation for my mattress?Learn more

Metal Bed Frame - Twin XLSmart leg design eliminates tipping.$249.00
Smart leg design eliminates tipping.
The bed frame pairs perfectly with either of these foundations
Ultra Low Profile Foundation - Twin XLSleek and sturdy base without the height.$349.00
Sleek and sturdy base without the height.
Heavy Duty Foundation - Twin XL5x stronger than a standard foundation.$349.00
5x stronger than a standard foundation.

Looking for enhanced support options?

Show me the fancy bases

BUNDLE BEDDING & SAVE!

Split King Bundle: $582.75$627.00

Big Fig Mattress Protector - Twin XL (x2)

$149.00

Big Fig Premium Cooling Sheets - Split King

$279.00

Big Fig Adjustable Pillows - King 2 pack

$199.00

Big Fig Premium Cooling Sheets - Split King (Color)

Navy

Love it, wish I didn’t wait. Absolutely love our mattress. . it is very firm! Probably the firmest mattress I’ve ever slept on and still comfy. And the bed frame and foundation are so sturdy! Can’t recommend enough!

Courtney H. Verifyed Buyer

Big Fig Firm Mattress - Split King

Split king Big Fig Mattress on an adjustable base bed frame with in a bedroom with wall art and furniture.

Close-up of Big Fig top panel with THERMOGEL COOLING® Technology infused

Split King Big Fig Firm Mattresses on an adjustable base on a wood floor

Cutaway view of Big Fig Firm Mattress showing quilted cover, dense foam layer, and pocketed coils for extra support.

Courtney H. Verifyed Buyer

Face Up Or Face Down

BEST FIRM MATTRESS FOR BACK & STOMACH SLEEPERS

The Big Fig Firm Mattress is purpose-built for people who live large, move big and expect more—from their day, their body and especially their bed. Crafted with care, tested to last and unapologetically supportive, this mattress is more than firm—it's a daily commitment to waking up strong, aligned and ready for whatever (or whoever) rolls into your lane.

Sleep Firm.
Stay Cool.

Big Fig Firm’s quilted top is infused with THERMOGEL COOLING® technology that activates with your body heat to help regulate temperature and keep things chill when the night heats up. Paired with breathable, perforated foam layers that boost airflow, it’s built for cooler, drier, “finally-not-sweating-through-my-PJs” sleep.

Want the coolest sleep ever?

Shop Premium Cooling Sheets

Big Fig's Firm Mattress Quilted Top Has THERMOGEL COOLING® Technology That Reacts To Your Body Heat, Activating Cooling Relief. Paired With Breathable Perforated Foam, This Top Layer Keeps The Air Flowing So You Wake Up Sweat-Free.

Big Fig's Firm Mattress Is Made With Two Layers Of High-Density Foam, Delivering No-Sag Cushioning That Holds Its Shape For Long-Lasting Comfort And Support.

Big Fig's Firm Mattress Is Packed With As Many Pocketed Coils As It Could Handle For Big, Comfortable Sleep.

No More Weak Edges Or Accidental Slip-Offs. Get Serious Strength, Stability And Support On Every Inch Of Your Big Fig Firm Mattress, Whether You’re Sleeping, Sitting Or Lounging.

More Intentional Construction Than Other Firm Mattresses

The Big Fig Firm Mattress is stacked with purpose. Instead of fluff and filler, it's packed with high-tech materials for better sleep. Let’s break it down—layer by layer—and show you why this is the best extra firm mattress.

Cooling Top Layer

Night sweats? Our quilted mattress top has THERMOGEL COOLING® technology that reacts to your body heat, activating cooling relief. Paired with breathable perforated foam, this top layer keeps the air flowing so you wake up sweat-free.

2 Layers Of High-Density Poly Foam

Comfort that won’t crush. Two layers of high-density foam deliver no-sag cushioning that holds its shape for long-lasting comfort and support.

50% Higher Overall Coil Density

We packed this mattress with as many pocketed coils as it could handle for big, comfortable sleep. Our heavy-duty, 15-gauge steel coils contour to your body and absorb motion—so your partner’s restless legs stay on their side.

High Density, 80 ILD Edge Foam

No more weak edges or accidental slip-offs. Get serious strength, stability and support on every inch of your mattress, whether you’re sleeping, sitting or lounging.

Which Big Fig Is YOUR Big Fig? Let’s Compare.

Big Fig Firm Mattress - Extra Support, 11.5"

Ultra-Firm Support
Best for Back Sleepers
THERMOGEL COOLING® Technology

Comfort

2" of high-density foam layers

Cooling

4°F cooler at first touch

Firmness

SoftFirm

Split King$2,249.00

Selected

Big Fig Classic Mattress - Our Best Seller, 12.5"

Medium-Firm Support
Best for Multi-Position Sleepers
THERMOGEL COOLING® Technology

Comfort

4" of high-density foam layers

Cooling

4°F cooler at first touch

Firmness

SoftFirm

Split King$2,399.00

Shop Classic

Big Fig Luxe Mattress - Plush Yet Supportive, 13"

Luxury-Firm Support
Best for Side Sleepers
LPDE Cooling Technology

Comfort

5" of specialty + HD foam layers

Cooling

10°F cooler at first touch

Firmness

SoftFirm

Split King$3,249.00

Shop Luxe

Start Mattress Quiz

Hybrid Mattress Design

PLUSHER? FIRMER?
YOU CALL THE SHOTS.

Whether you like it plusher, firmer or somewhere in between-er, we got you. Hybrid mattresses with support where you need it, comfort where you want it and zero “ugh, why did I buy this?” Because when your mattress feels just right, you wake up winning.

SoftFirm

Big Fig Luxe

Big Fig Classic

Big Fig Firm

THE COMPETITION?

BLESS THEIR HEARTS.

Some mattresses say they're durable. Some say they offer firm support. We say: Prove it.

	Firm
Length of Free Trial	120 Nights	Lull Doesn't Have A Comparable Product to The Big Fig Firm Try selecting a different Big Fig product to compare against this competitor.
Warranty	Lifetime
Support System: All Foam or Innerspring	Innerspring
Cooling Technology	Included—THERMOGEL COOLING ®
Published Durability Testing
Max Weight Support	1,100lbs
Edge Support

View Full Comparison

OUR FOUNDATIONS WON’T LET YOU DOWN—LITERALLY

BASES

BIG FIG PLATFORM BED

Minimalist Style With Maximum Strength

Shop Platform Bed

Big Fig's Adjustable Base Does More, So You Can Too.

BIG FIG ADJUSTABLE BASE

The Base That Does More, So You Can Too

Shop Adjustable Base

"Best Decision. We've been looking into getting a Big Fig for a couple of years. We finally did it, and it was the best decision. My wife had back surgery, and the support of the mattress is great. We got the Big Firm. We are sleeping better than ever."

Sara P. Verified Buyer

See Why People Love
The Big Fig Firm Mattress

Frequently Asked Questions

See All FAQs

Big Fig Firm Mattress - Split King

Stability and alignment? This firm mattress understood the assignment.

Select a size:

Size Guide

$2,249.00

Lifetime Warranty

120 Night Sleep Trial

Made In The USA

Big Fig Firm Mattress - Split King

​​​BEST FIRM MATTRESS FOR BACK & STOMACH SLEEPERS​​

​​​Sleep Firm.Stay Cool.​​​​

Want the coolest sleep ever?

More Intentional Construction Than Other Firm Mattresses

Cooling Top Layer

2 Layers Of High-Density Poly Foam

50% Higher Overall Coil Density

​High Density, 80 ILD Edge Foam

Which Big Fig Is YOUR Big Fig? Let’s Compare.

Big Fig Firm Mattress - Extra Support, 11.5"

Split King$2,249.00

Big Fig Classic Mattress - Our Best Seller, 12.5"

Split King$2,399.00

Big Fig Luxe Mattress - Plush Yet Supportive, 13"

Split King$3,249.00

PLUSHER? FIRMER? YOU CALL THE SHOTS.

BLESS THEIR HEARTS.

OUR FOUNDATIONS WON’T LET YOU DOWN—LITERALLY

BIG FIG PLATFORM BED

Minimalist Style With Maximum Strength

BIG FIG ADJUSTABLE BASE

The Base That Does More, So You Can Too

See Why People Love The Big Fig Firm Mattress

Frequently Asked Questions

​​​What Is The Best Firm Mattress?​​

​​​What Makes A Mattress Firm?​​

​​​Are Firm Mattresses Better?​​

​​Is A Firm Mattress Good For Stomach Sleepers​​​?

​​​Is A Firm Mattress Good For Back Pain?​​

Are All The Big Fig Mattress Warranties The Same?

​​​What Cooling Features Does the Big Fig Firm Mattresses Have?​​​​

What Is The Best Firm Mattress That Won’t Sag?

​​​How Does The Big Fig Firm Mattress Compare To A Foam Mattress?​​​​

​​​How Does The Big Fig Firm Mattress Feel?​​​​

What are the dimensions of the Split King Firm Mattress?

How much does the Firm Mattress weigh in Split King?

Does the Split King Firm Mattress fit standard Split King bed frames?

Will the Split King Firm Mattress fit through my door, hallway, or stairwell?

How thick is the Big Fig Firm Mattress?

BEST FIRM MATTRESS FOR BACK & STOMACH SLEEPERS

Sleep Firm.
Stay Cool.

High Density, 80 ILD Edge Foam

Big Fig Firm Mattress - Extra Support, 11.5"

Big Fig Classic Mattress - Our Best Seller, 12.5"

PLUSHER? FIRMER?
YOU CALL THE SHOTS.

See Why People Love
The Big Fig Firm Mattress

What Is The Best Firm Mattress?

What Makes A Mattress Firm?

Are Firm Mattresses Better?

Is A Firm Mattress Good For Stomach Sleepers?

Is A Firm Mattress Good For Back Pain?

What Cooling Features Does the Big Fig Firm Mattresses Have?

How Does The Big Fig Firm Mattress Compare To A Foam Mattress?

How Does The Big Fig Firm Mattress Feel?