Serta iComfortPRO Quilted Granby Extra Firm 11.5 inch mattress on a wooden bed frame in a blue bedroom.

Serta iComfortPRO Granby 11.5" extra firm mattress featuring a quilted cooling cover and 5-zone support.

Side cross-section of Serta iComfortPRO Granby extra firm mattress showing internal support and cooling layers.

Close-up of the breathable quilted surface on a Serta iComfortPRO Granby extra firm 11.5 inch mattress.

Top-down view of the Serta iComfortPRO Granby extra firm mattress with a geometric quilted pattern.

Close-up of the Serta iComfortPRO Granby extra firm mattress label and quilted navy blue side panel.

Extra firm mattress for back and stomach sleepers, featuring the Serta iComfortPRO Granby 11.5" model.

Serta Granby extra firm mattress diagram highlighting latex foam, cooling, and 5-zone spinal alignment.

Couple relaxing on a Serta iComfortPRO Granby extra firm mattress, ideal for shared cooling and support.

Exploded view of Serta iComfortPRO Granby mattress layers including latex pressure relief and 5-zone support.

Serta iComfortPRO Quilted Granby Extra Firm 11.5 Inch Mattress

Plush Medium Firm Pillow top Memory foam Hybrid

Serta iComfortPRO Quilted Granby Extra Firm 11.5 Inch Mattress

$1,399.00

$2,299.00

Save $900.00

Brand:

Serta

i Size Guide

$1,399.00

Only 17 left in stock

Free USA Wide Delivery

10 Year Warranty

Advanced Technology

The Serta iComfortPRO Quilted Granby Extra Firm Mattress is engineered for sleepers who want the firmest possible support paired with the natural cooling of premium latex foam. To begin with, it brings together a quilted cool-to-the-touch top with naturally-derived True Response™ Latex Foam to deliver responsive, restorative sleep night after night.

Next, the feel is uncompromisingly firm. As an extra firm Serta mattress for back pain considerations, the Granby is purpose-built for stomach and back sleepers who need maximum spinal support, making it a leading choice for the best extra firm mattress for stomach sleepers.

Moreover, the cooling system uses one of nature's best temperature regulators. Latex foam from rubber trees is naturally breathable and does not trap heat the way synthetic foams can. Paired with the quilted CoolFeel Pro™ cover, the result is advanced thermal regulation cooling that performs night after night.

Because of this latex-first approach, the bed delivers maximum spinal alignment support, targeted heavy-duty pressure relief, and a zero-sag, durable sleep surface within a sleek 11.5-inch profile. The result is firm, responsive support that holds its shape over years of use.

Finally, this iComfortPRO Quilted Extra Firm Mattress is backed by a 10-year limited warranty and built to CertiPUR-US certified foam standards. Cloudy Mattress holds authorized Serta retailer status, financing is available now, and you can add an adjustable bed, a box spring with a metal foundation, or old mattress removal at checkout. Customers ready to buy Serta iComfortPRO online can shop confidently here.

Extra firm feel for back and stomach sleepers

This mattress is built for sleepers who need solid, unyielding support, making it a strong candidate as an extra-firm Serta mattress for back pain management.

Naturally-derived latex foam

Two inches of True Response™ Latex Foam deliver a responsive, durable comfort surface that adapts to movement without sinking. Latex is naturally non-toxic and breathable.

Naturally cool sleep surface

Latex does not trap heat the way synthetic foams can. Combined with the quilted cool-to-the-touch cover, this delivers advanced thermal regulation cooling for sleepers who run warm.

Zoned support for spinal alignment

Serta's 5 ZoneResponse™ Design provides head-to-toe support across five engineered latex zones, anchoring maximum spinal alignment support through every position.

Long-lasting durability

Latex foam is naturally durable and resists body impressions over time. The supportive base layer provides a zero-sag, durable sleep surface that maintains its feel for years.

Quiet, undisturbed nights

All-foam construction with zoned latex helps minimize partner movement, supporting restful sleep for couples.

Adjustable base compatible

This mattress is an adjustable base compatible, so you can pair it with a power foundation for elevated head or foot positions.

Certified, trusted materials

Built with CertiPUR-US certified foam and proudly made in the USA, the Granby sits within the premium Serta iComfortPRO Collection.

Key Mattress Benefits

5 Layers
Of Cooling
Comfort

The top surface uses a cool-to-the-touch quilted fabric designed to feel refreshing the moment you lie down. This quilted top helps you fall asleep more easily by lowering the surface temperature on contact.

A layer of PillowSoft® Foam sits below the cover, providing enhanced cushioning that softens the surface slightly without compromising the extra firm support beneath. This thin comfort layer protects against pressure points while keeping the overall feel firm.

Two inches of 100% naturally-derived latex foam follow. This is the heart of the iComfortPro design. Latex is responsive, durable, breathable, and non-toxic by nature, giving the bed both its bounce-back feel and its temperature-regulating properties.

The latex layer is engineered with five distinct support zones that alternate firmness across the bed. These zones provide firmer support under the lumbar and hip region while contouring the body's natural curves, delivering targeted heavy-duty pressure relief without softening the extra firm feel.

The base layer establishes the 11.5-inch mattress profile and provides durable, consistent support edge to edge. This high-density foundation anchors the entire bed and is what gives the Granby its zero-sag, durable sleep surface and long-term shape retention.

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HAVE QUESTIONS?

WE'VE GOT ANSWERS

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

The Granby is Serta's most supportive iComfortPro option, built to an Extra Firm feel. It sits at the firmest end of the comfort scale, with minimal give in the comfort layers and a high-density support core beneath. Serta specifically positions it for stomach sleepers, back sleepers, and anyone who needs robust support for maximum spinal alignment.

Yes. Back sleepers benefit from firm support because it keeps the spine in neutral alignment and prevents the hips from sinking out of position. The Granby's Extra Firm feel, combined with 5 ZoneResponse™ latex zones under the lumbar area, makes it well-suited to back sleepers who want to wake up without lower-back pressure.

No. The Granby is a latex foam mattress, not a hybrid. It does not contain pocketed coils or innersprings. Its support and responsiveness come from True Response™ Latex Foam over a high-density support foam core, all engineered into a sleek 11.5-inch profile.

No. The quilted top uses CoolFeel Pro™ fabric, which is engineered to feel cool to the touch on contact. Paired with the natural breathability of latex foam below, the surface supports advanced thermal regulation cooling rather than trapping body heat the way some synthetic foams can.

Yes. The Granby is an adjustable base compatible and works with motorized power foundations, as well as traditional frames, platform beds, slatted frames, bunky boards, and box springs. At checkout on Cloudy Mattress, you can add an adjustable bed, a box spring with a metal foundation, or old mattress removal service.

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Serta iComfortPRO Quilted Granby Extra Firm 11.5 Inch Mattress