Coil Density Twin Xl Mattresses

Shop Coil Density Twin Xl Mattresses at Mattress Firm to find a comfortable sleep solution for rooms that need a longer twin size. Explore available Twin XL mattresses by coil density and compare options to help you choose the right fit for your sleep space.

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Beautyrest PressureSmart 2.0 Firm 11" Mattress

Starting at

$674⁹⁹

$1349⁹⁹

$675 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Temperature
Bed Partner
Pain
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest BR800 11.25" Firm Mattress

2233

Starting at

$469⁹⁹

$959⁹⁹

$490 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Toss and Turn
Pain
Bed Partner
Temperature

FREE ADJUSTABLE BASE ³ with code ELEVATE

Serta Perfect Sleeper Sleep Excellence Plush Mattress

733

Starting at

$549⁷⁷

$1099⁹⁹

$550 OFF

Plush Comfort, best for

Side Sleepers
Pain
Toss and Turn
Temperature
Bed Partner

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sleepy's By Sealy Slumber Cushion Firm Mattress

301

Starting at

$1379⁹⁹

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest BR800 12" Plush Euro Top Mattress

735

Starting at

$429⁹⁹

$1099⁹⁹

$670 OFF

Plush Comfort, best for

Side Sleepers
Toss and Turn
Pain
Bed Partner
Temperature

Serta Perfect Sleeper Elkins III 10" Firm Mattress

1573

Starting at

$449⁹⁹

$899⁹⁹

$450 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Temperature
Toss and Turn
Bed Partner

Beauty Sleep® Midnight Dream 12.5" Firm Mattress

171

Starting at

$389⁹⁹

$1129⁹⁹

$740 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Toss and Turn
Bed Partner
Temperature
Pain

FREE ADJUSTABLE BASE ³ with code ELEVATE

Serta Perfect Sleeper Charlotte 2.0 Medium Euro Top Mattress

2615

Starting at

$629⁹⁹

$1099⁹⁹

$470 OFF

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sleepy's Rest Firm 2.0 Innerspring Mattress

7001

Starting at

$449⁹⁹

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

Beautyrest Greenwood 10.5" Firm Mattress

3368

Starting at

$339⁷⁷

$849⁹⁹

$510 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Toss and Turn
Temperature
Bed Partner

Serta Perfect Sleeper Sleep Excellence Medium PillowTop Mattress

1433

Starting at

$1399⁹⁹

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest BR800 13.5" Plush Pillow Top Mattress

2784

Starting at

$549⁹⁹

$1179⁹⁹

$630 OFF

Plush Comfort, best for

Side Sleepers
Toss and Turn
Pain
Bed Partner
Temperature

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest Silver BRS900 11.75" Extra Firm Mattress

3296

Starting at

$569⁹⁹

$1359⁹⁹

$790 OFF

Extra Firm Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest BR800 13.5" Medium Pillow Top Mattress

1863

Starting at

$549⁹⁹

$1179⁹⁹

$630 OFF

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest Silver BRS900-C 13.75" Extra Firm Mattress

1810

Starting at

$599⁹⁹

$1399⁹⁹

$800 OFF

Extra Firm Comfort, best for

Back, Stomach Sleepers
Temperature
Pain
Bed Partner
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest Silver BRS900 11.75" Medium Firm Mattress

1745

Starting at

$669⁹⁹

$799⁹⁹

$130 OFF

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sealy Essentials Winter Green 13" Plush Euro Pillow Top Mattress

548

Starting at

$614⁹⁹

$1129⁹⁹

$515 OFF

Plush Comfort, best for

Side Sleepers
Bed Partner
Pain
Temperature
Toss and Turn
Allergies

Serta Perfect Sleeper Nurture Night 12" Firm Mattress

1186

Starting at

$579⁰⁰

$649⁰⁰

$70 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest Silver BRS900 12" Plush Mattress

1140

Starting at

$529⁹⁹

$1399⁹⁹

$870 OFF

Plush Comfort, best for

Side Sleepers
Temperature
Pain
Bed Partner
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Serta Perfect Sleeper Nurture Night 14.5" Pillow Top Mattress

1130

Starting at

$649⁰⁰

$799⁰⁰

$150 OFF

Plush Comfort, best for

Side Sleepers
Pain
Temperature
Bed Partner
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Serta Perfect Sleeper Nurture Night 13.5" Medium Mattress

1020

Starting at

$659⁰⁰

$749⁰⁰

$90 OFF

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Serta Perfect Sleeper Nurture Night 13.5" Plush Mattress

916

Starting at

$659⁰⁰

$749⁰⁰

$90 OFF

Plush Comfort, best for

Side Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Serta Perfect Sleeper Midsummer Nights 11" Plush Eurotop Mattress

882

Starting at

$579⁰⁰

$649⁰⁰

$70 OFF

Plush Comfort, best for

Side Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest Black Series Two 16.25" Plush Pillow Top Mattress

292

Starting at

$2549⁰⁰

$2949⁰⁰

$400 OFF

Plush Comfort, best for

Side Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

$300 ⁶ adjustable base instant gift with purchase.

Purple RestorePlus 13" Soft Hybrid Mattress

3530

Starting at

$2540⁰⁰

$3099⁰⁰

$559 OFF

Plush Comfort, best for

Side Sleepers
Pain
Allergies
Bed Partner
Toss and Turn
Temperature

Beautyrest Black Series Three 15.25" Medium Mattress

2287

Starting at

$2849⁰⁰

$3449⁰⁰

$600 OFF

Medium Comfort, best for

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

$300 ⁶ adjustable base instant gift with purchase.

Coil density is an important factor to consider when shopping for a Twin XL mattress because it can influence support, durability and how the mattress responds to movement. A mattress with a higher coil count may offer more targeted support and improved weight distribution, while individually wrapped pocketed coils can help reduce motion transfer between sleepers. Traditional innerspring Twin XL mattresses use interconnected coils for a responsive feel and reliable support, while hybrid Twin XL mattresses combine a coil support system with comfort layers such as memory foam, latex or other pressure-relieving materials. The ideal coil density depends on your preferred comfort level, body type and sleep position, so coil count should be evaluated alongside mattress firmness, materials, construction and warranty coverage. A Twin XL mattress typically measures about 38 inches wide by 80 inches long, making it a practical choice for taller sleepers, college dorm rooms, guest rooms and adjustable bed frames designed for the Twin XL size. Look for a well-constructed Twin XL coil mattress with reinforced edges, durable upholstery layers and a support system that keeps your spine comfortably aligned. Higher coil density does not automatically mean a better mattress, since the quality, thickness and placement of the coils also affect performance. Comparing coil density, coil type, firmness and comfort layers can help you find a Twin XL mattress that delivers balanced support, pressure relief and comfortable zzz's night after night.

What is coil density in a mattress? + -

Coil density refers to the number of coils used within a specific area of a mattress. It is one detail that describes the mattress’s internal construction.

How is coil density different from coil count? + -

Coil count is the total number of coils in a mattress, while coil density describes how many coils are used within a defined area. Comparing density can provide a more consistent view of coil construction across mattresses with different dimensions.

What types of coils are used in mattresses? + -

Common mattress coil types include continuous coils, Bonnell coils, offset coils and pocketed coils. Pocketed coils are individually wrapped, while the other types are connected in different configurations.

What is coil gauge in a mattress? + -

Coil gauge refers to the thickness of the wire used to make a mattress coil. A lower gauge generally indicates thicker wire, while a higher gauge indicates thinner wire.

What other construction details should I compare with coil density? + -

Review the coil type, coil gauge, comfort layers, support layers, edge construction and upholstery materials. Considering these details together gives you a fuller picture of a mattress’s design.