Front view of the South Bay Essentials 10-inch gel-infused memory foam mattress on a walnut platform bed frame in a modern bedroom with green walls.

Cooling features graphic for South Bay Essentials mattress highlighting temperature-neutral sleep using gel-infused memory foam and articulated cuts.

Three-quarter angle of the Essentials 10-inch firm memory foam mattress by South Bay, showcasing the light grey quilted top and charcoal side panels.

Overhead view of the South Bay Essentials mattress sleep surface highlighting the breathable diamond-quilted comfort cover.

Easy 3-step setup infographic for South Bay mattresses: unbox, unroll, and sleep, showing a woman sleeping comfortably.

Numbered infographic of the South Bay Essentials 10-inch mattress construction including comfort quilt, gel-infused layer, and 9-inch reactive core.

Mattress firmness scale for South Bay Essentials indicating a "Medium" feel, recommended for side, stomach, and back sleepers.

Infographic for South Bay Essentials mattress explaining targeted hip support and articulated cuts designed for use with adjustable bed bases.

Technical diagram of South Bay 10-inch Essentials mattress layers highlighting cooling gel foam, Air Channel base support, and adjustable base compatibility.

Essentials Gel Infused Memory Foam Comfort Reactive 10 inch Firm Mattress By South Bay

Plush Medium Firm Pillow top Memory foam Hybrid

Essentials Gel Infused Memory Foam Comfort Reactive 10 inch Firm Mattress By South Bay

$388.00

$595.00

Save $207.00

Brand:

SOUTH BAY

i Size Guide

$388.00

Only 13 left in stock

Free USA Wide Delivery

10 Year Warranty

Advanced Technology

The South Bay Essentials 10 Inch Mattress is a value-focused all-foam sleep solution that delivers cooling gel comfort and structured support in a 10-inch profile. Cloudy Mattress is the authorized South Bay retailer for this product, so every purchase comes from a trusted retail source backed by the manufacturer's full warranty.

The feel sits firmly on the supportive side of the comfort spectrum, making it a confident 10-inch firm memory foam mattress for back and stomach sleepers. Because of this structured response, it ranks among the top 10-inch firm mattress options for back pain in the value tier.

Inside, engineered foam layers work together, beginning with gel-infused viscoelastic foam at the surface for contouring comfort and heat dissipation. This gel-infused firm mattress, 10 inches, uses cooling gel sleep technology to draw heat away from the body for a more breathable sleep environment. Furthermore, the reactive comfort foam technology transition layer bridges the soft top and supportive base, balancing weightless pressure relief with structured lift.

The open-cell foam structure throughout the build promotes airflow, supporting deep restorative sleep through the night. Beneath the comfort layers, a high-density poly-foam base anchors the mattress with the firm orthopedic feel and stability sleepers need.

The construction also delivers targeted spinal alignment support that benefits back and stomach sleepers seeking firm, no-sink rest. At a full 10-inch profile, this South Bay Comfort Reactive mattress is fully adjustable base compatible, pairing seamlessly with modern foundations.

The mattress arrives via Mattress-in-a-box delivery, compressed and rolled for convenient setup, and is backed by a 10-year manufacturer's warranty. Additionally, it features non-toxic certified materials with CertiPUR-US certified foams for healthier indoor air quality.

Cooling Gel-Infused Comfort

The gel-infused viscoelastic foam top layer uses cooling gel sleep technology to dissipate body heat for a more comfortable night.

Firm, Supportive Feel

This 10 inch firm memory foam mattress delivers a firm orthopedic feel ideal as a firm mattress for back sleepers and stomach sleepers.

Pressure Relief Where You Need It

Reactive comfort foam technology in the transition layer delivers weightless pressure relief at hips, shoulders, and lower back.

Durable Long-Term Support

A high-density poly-foam base provides therapeutic foam layering that supports lasting shape and consistent performance.

Targeted Alignment Support

Layered foams work together to deliver targeted spinal alignment support, especially helpful for back-leaning sleepers.

Adjustable Base Ready

Fully adjustable base compatible, this 10-inch mattress pairs seamlessly with your preferred foundation.

Certified Clean Foams

Built with CertiPUR-US certified foam and non-toxic certified materials, made without formaldehyde, phthalates, heavy metals, or ozone depleters.

Key Mattress Benefits

4 Layers
Of Cooling
Comfort

This top comfort layer is the gel-infused viscoelastic foam that gives the mattress its cradling feel. The gel infusion is engineered to promote breathability so the surface stays cooler than traditional memory foam.

This middle layer uses reactive comfort foam technology to bridge the soft top and the firm base. As a result, sleepers get balanced contouring with pressure-relieving mattress layers that support targeted spinal alignment.

This bottom layer is the high-density poly-foam base that reinforces stability and anchors the overall build. Furthermore, the channeled construction promotes airflow through the core, supporting cooling from below.

The exterior quilted cover delivers a soft, breathable finish to the sleep surface and complements the gel-infused cooling system below. Its construction supports a fresher feel through regular cleaning and care.

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.

FASTEST SHIPPING

Get your new mattress delivered quicker than ever with our priority nationwide shipping.

24 / 7 CUSTOMER SUPPORT

Get your new mattress delivered quicker than ever with our priority nationwide shipping.

EXPERT GUIDANCE

Get your new mattress delivered quicker than ever with our priority nationwide shipping.

BEST PRICE GUARANTEED

Get your new mattress delivered quicker than ever with our priority nationwide shipping.

Comfort reactive foam changes everything

Standard memory foam is slow and holds its shape. Comfort reactive foam springs back quickly so when you shift positions it adapts immediately rather than holding the imprint of where you were. On a firm mattress this is a meaningful distinction - the support is consistent whether you're on your back side or stomach. South Bay built a firm mattress that responds to you rather than resisting you.

Back pain gone - my PT is pleased

My physical therapist specifically prescribed firm memory foam for my lumbar disc issues. I've tried other firm mattresses and the pressure points created by dense foam always caused a different problem. The comfort reactive foam on this mattress relieves surface pressure while keeping the firm support underneath. Three weeks in back pain gone. PT confirmed at last session.

Gel keeps firm foam from sleeping hot

Firm foam is denser and can trap heat more than softer foam. The gel infusion actively manages that. The surface temperature is notably cooler than the firm foam mattresses I've owned before. South Bay addressed the temperature trade-off that comes with high-density firm construction. Firm and cool in one mattress is not common - they made it work.

Firm is genuinely firm - prepare for adjustment

The Essentials Firm is well-constructed and the gel cooling works. My note is that this is a truly firm mattress - not medium firm not firm-ish. Genuinely firm. Coming from a medium mattress the first two weeks were an adjustment. By week three it was comfortable and now I sleep better than I ever did on medium. Just go in knowing the real firmness level and give it time.

Firm without the punishing feel

I've tried firm mattresses that felt like sleeping on a slightly padded floor. The gel infusion and comfort reactive foam in this mattress add enough surface response to make firm feel like a choice rather than a compromise. Stomach and back sleepers who need true firm support but want some surface give - this is the mattress.

HAVE QUESTIONS?

WE'VE GOT ANSWERS

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

Yes, the 10-inch Essentials sits on the firm side of the comfort scale, making it well-suited for back and stomach sleepers who want stable, no-sink support. The transitional reactive foam still provides contouring comfort, so the firm feel doesn't sacrifice pressure relief at the shoulders and hips.

A box spring is not required. The mattress can be placed on a continuously solid surface, an adjustable base, or slats spaced no more than two inches apart. Cloudy Mattress also offers an optional box spring with a metal foundation as an add-on at checkout.

Yes, the top layer is built with gel-infused memory foam designed to dissipate body heat. The gel beads conduct heat away from the surface, and the open-cell foam structure adds airflow, making the top of the mattress noticeably cooler than dense conventional memory foam.

The mattress may take up to 72 hours to fully recover its shape after unboxing. You can sleep on it right away, as body heat and movement help speed the expansion process along.

Yes, all foams in this mattress are CertiPUR-US certified. They are made without formaldehyde, phthalates, ozone depleters, heavy metals, PBDEs, or listed Tris flame retardants, and they meet low-VOC standards for indoor air quality.

Still

Have Questions ?

Our sleep specialists are dedicated to helping you find the mattress of your dreams. Give us a call or chat with us now.

GIVE US A CALL

Speak directly with an expert to find the right support for your sleep style.

+1 800 540 9851

CHAT WITH US

Get the answers you need without picking up the phone.

Let’s Chat!

SEND US A MAIL

Prefer to write it out? Drop us a message, and we’ll get back to you within 24 hours.

Send An Email