Twin Xl Soft Knit Mattresses

Twin Xl Soft Knit Mattresses offer a size-specific option for bedrooms, guest rooms and other sleeping spaces. Explore the selection at Mattress Firm to find the mattress that fits your space, preferences and budget.

Sort & Filter

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 PressureSmart 2.0 Plush 11.75" Mattress

6251

Starting at

$724⁹⁹

$1449⁹⁹

$725 OFF

Plush Comfort, best for

Side Sleepers
Temperature
Bed Partner
Pain
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sleepy's By Sealy Medium Euro Top Mattress

4439

Starting at

$209⁹⁹

$419⁹⁹

$210 OFF

Medium Comfort, best for

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

Sleepy's By Sealy Memory Foam Plush Mattress

2776

Starting at

$529⁹⁹

$829⁹⁹

$300 OFF

Plush Comfort, best for

Side Sleepers
Pain
Bed Partner
Toss and Turn
Temperature

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

Beautyrest PressureSmart 2.0 Plush Pillow Top 13.75" Mattress

2695

Starting at

$799⁹⁹

$1599⁹⁹

$800 OFF

Plush Comfort, best for

Side Sleepers
Temperature
Bed Partner
Pain
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

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

Tempur-Pedic TEMPUR-Adapt 11" Medium Previous Generation Mattress

3631

Starting at

$1189⁷⁷

$1699⁰⁰

$509 OFF

Medium Comfort, best for

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

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 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

Sleepy's 3" Gel Memory Foam Mattress Topper

396

Starting at

$99⁹⁹

$149⁹⁹

$50 OFF

Medium Comfort,

Temperature

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

Tulo Bamboo 10" Medium Green Tea Memory Foam Mattress

5555

Starting at

$249⁹⁹

$589⁹⁹

$340 OFF

Medium Comfort, best for

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

Tulo Bamboo 12" Medium Plush Green Tea Memory Foam Mattress

5555

Starting at

$269⁹⁹

$629⁹⁹

$360 OFF

Medium Comfort, best for

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

Beautyrest Silver BRS900-C 13.75" Extra Firm Mattress

1810

Starting at

$669⁹⁹

$1559⁹⁹

$890 OFF

Extra Firm Comfort, best for

Back, Stomach Sleepers
Temperature
Pain
Bed Partner
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Tulo Bamboo 8" Medium Green Tea Memory Foam Mattress

5555

Starting at

$199⁹⁹

$499⁹⁹

$300 OFF

Medium Comfort, best for

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

Purple Original Mattress

59743

Starting at

$1040⁰⁰

$1299⁰⁰

$259 OFF

Medium Comfort, best for

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

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

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

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

Sleepy's By Sealy Slumber Medium Mattress

175

Starting at

$469⁹⁹

$1529⁹⁹

$1060 OFF

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sealy Essentials Winter Green 12" Medium Euro Top Mattress

603

Starting at

$489⁹⁹

$879⁹⁹

$390 OFF

Medium Comfort, best for

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

Tulo Bamboo 6" Firm Green Tea Memory Foam Mattress

5558

Starting at

$449⁹⁹

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

$679⁰⁰

$849⁰⁰

$170 OFF

Plush Comfort, best for

Side Sleepers
Pain
Temperature
Bed Partner
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

A Twin XL soft knit mattress offers a comfortable sleep surface with a smooth, flexible feel that can help create a cozy bedroom retreat. Designed to fit Twin XL bed frames, these mattresses measure longer than standard twin mattresses, making them a practical choice for taller sleepers, college dorm rooms, guest bedrooms and adjustable bed setups. A soft knit mattress cover may provide gentle stretch and a comfortable hand feel while allowing the layers beneath to support your body. Depending on the design, shoppers can find Twin XL mattresses with memory foam, innerspring coils or hybrid construction to match different preferences for pressure relief, responsiveness and support. Choosing the right Twin XL soft knit mattress starts with considering your preferred firmness, sleeping position and overall comfort needs. Side sleepers may appreciate a softer sleep surface that cushions the shoulders and hips, while back and combination sleepers may prefer a balanced feel with supportive layers that make it easier to move. Look for features such as breathable materials, cooling technology, motion isolation and edge support to find a Twin XL mattress that fits your sleep style. Pair your mattress with Twin XL sheets, a protective mattress pad and a supportive Twin XL bed frame for a comfortable, well-coordinated sleep space and better zzz's.

What is a soft knit mattress? + -

A soft knit mattress has a flexible, fabric-knit cover designed to provide a smooth, cozy surface. The cover may be made from materials such as polyester, rayon or a blend of fibers.

What materials are commonly used in soft knit mattress covers? + -

Soft knit mattress covers commonly use polyester, rayon, cotton or blended fabrics. Some may also include specialty fibers or quilted layers for added texture.

How should I clean a soft knit mattress cover? + -

Follow the care instructions provided with the mattress. For removable covers, check the label before washing. For nonremovable covers, use a mattress protector and spot-clean small areas with a mild upholstery cleaner.

Can a soft knit mattress be used with a mattress protector? + -

Yes, a mattress protector can be used over a soft knit mattress. Choose one that fits securely and allows the mattress surface to retain its intended feel.

Does a soft knit mattress have a specific firmness level? + -

Soft knit describes the mattress cover rather than the mattress firmness. Mattresses with soft knit covers are available in a range of firmness options, depending on their internal comfort layers and support systems.