Serta iComfortPro Granby 11.5-Inch Extra Firm Twin XL Latex Foam Mattress

Serta iComfortPro Granby is an 11.5-inch, extra-firm Twin XL mattress built around latex foam. Its five-zone support design and cooling-focused cover are intended for buyers who want a firm, responsive foam surface, while the unusually conflicting listed dimensions make a size check important.

At a glance

The listing describes an extra-firm feel and identifies stomach and back sleepers as intended users.
A five-zone response design is claimed to target support and contouring across the body.
The listed latex foam and cool-to-the-touch cover are presented as breathable and temperature regulating.
The manufacturer claims a 100-night trial, a 10-year limited warranty, CertiPUR-US-certified foams, adjustable-base compatibility and delivery not compressed in a box.

Price

$1,399.00Save 18%

Reference price: ~~$1,699.00~~

Price checked: Nov 14, 2026

View offer Ahead of Black FridayExplore the selection

Pros and cons

Pros

Extra-firm construction may suit shoppers who specifically prefer a firmer mattress feel.
The latex comfort layer is described as responsive, with claimed pressure relief and low motion transfer.
Five-zone support and a cooling-focused cover offer distinct design features beyond a basic foam mattress.

Cons

The extra-firm feel is a poor match for buyers seeking a soft or plush sleep surface.
At 68.8 pounds, moving or positioning the mattress may take more effort than with a lighter mattress.

Technical specifications

15 specifications

Identity
Brand	Serta
Model	iComfortPro
Size	Twin XL
Firmness	Extra Firm
Construction	Latex Foam
Number of layers	5

Dimensions and installation
Dimensions listed	80 x 38 x 12 inches
Weight listed	68.8 pounds
Listed thickness	11.5 inches

Materials and design
Fill material	Latex
Cover material	Polycotton
Top style	Tight Top
Special features	Breathable, Durable, Low Motion Transfer, Pressure Relief, Temperature Regulating

Claimed features
Latex layer	2" of Serta's True Response Latex Foam
Support design	5 ZoneResponse Design

What to know before buying

Listing details to confirm

The listing is contradictory about dimensions: it gives 79.5"L x 39"W x 11.5"Th in one field, 80 x 38 x 12 inches in another, and separately describes the mattress as 11.5 inches thick. Confirm the selected Twin XL product's measurements before ordering. The 100-night trial and 10-year limited warranty are manufacturer claims, and the supplied details do not state their terms.

What’s in the box

Included

Mattress

Who is it for?

A good fit for

Stomach and back sleepers who prefer an extra-firm feel.
Twin XL shoppers interested in latex foam, zoned support and a cooling-focused cover.

Less suited to

People who want a plush or distinctly soft mattress.
Buyers who need dimensions confirmed without checking the inconsistent listing measurements.

Serta iComfortPro Granby 11.5-Inch Extra Firm Twin XL Latex Foam Mattress · photo 2 — Additional product photo 2

Customer reviews on Amazon

5 / 5 · 2 ratings

5 stars100%100%
4 stars0%0%
3 stars0%0%
2 stars0%0%
1 star0%0%

Only a very small set of aggregate ratings is provided, with all reported ratings in the top category. That is encouraging but too limited to establish a dependable pattern about comfort, firmness or durability. For this extra-firm latex model, consider the stated design and check the dimensions rather than treating the ratings as evidence of how it will feel to you.

Frequently asked questions

What size is the Serta iComfortPro Granby?

It is identified as Twin XL, but the listing gives conflicting dimensions: 79.5"L x 39"W x 11.5"Th and 80 x 38 x 12 inches. Confirm the measurements for the selected listing before purchase.

How firm is this mattress?

The listing describes it as Extra Firm and identifies stomach and back sleepers, or people who prefer an extra-firm feel, as intended users.

What is the comfort material?

The mattress is listed as latex foam, with a 2-inch True Response Latex Foam layer described in the feature text.

Is it compatible with adjustable bases?

The manufacturer claims that iComfortPro mattresses are compatible with adjustable bases. Confirm compatibility and applicable terms for the selected listing.