Twin Xl Outlet Foundations

Shop Twin XL Outlet Foundations at Mattress Firm to explore available foundation options for your bedroom. Find the right size and style to complement your sleep setup, with convenient choices for creating a comfortable space.

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Sleepy's Basic Box Spring Foundation

10627

Starting at

$169⁹⁹

Sealy Ease Adjustable Base

5067

Starting at

$949⁰⁰

Sleepy's Universal Box Spring Foundation

6359

Starting at

$219⁹⁹

Tempur-Pedic TEMPUR-Ergo 3.0 Adjustable Base

3723

Starting at

$1499⁰⁰

$1599⁰⁰

$100 OFF

Sleepy's Bunkie Board

3311

Starting at

$119⁹⁹

Tempur-Pedic Charcoal Box Spring Foundation

1350

Starting at

$255⁰⁰

Stearns & Foster SX4 Box Spring Foundation

718

Starting at

$240⁰⁰

Tempur-Pedic TEMPUR-Ergo ProSmart Adjustable Base

Starting at

$2399⁰⁰

$2599⁰⁰

$200 OFF

Calm app 3-month free trial with mattress purchase & registration

Tempur-Pedic TEMPUR-Ergo Smart Adjustable Base

994

Starting at

$1899⁰⁰

$2099⁰⁰

$200 OFF

Calm app 3-month free trial with mattress purchase & registration

Beautyrest Black 24 Box Spring Foundation

254

Starting at

$250⁰⁰

Tempur-Pedic Ultra Low Profile Foundation

325

Starting at

$255⁰⁰

Sleepy's Elite Adjustable Base

1129

Starting at

$1199⁹⁹

Save $299 with qualifying mattress purchase. Code: ELEVATE

Beautyrest Silver BRS900-C 13.75" Extra Firm Mattress

1813

Starting at

$1559⁹⁹

Extra Firm Comfort, best for

Back, Stomach Sleepers
Temperature
Pain
Bed Partner
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Kingsdown Crown Imperial Box Spring Foundation

Starting at

$274⁹⁹

Sealy Posturepedic Elite Albany II 14" Firm Mattress

784

Starting at

$1619⁰⁰

$1719⁰⁰

$100 OFF

Firm Comfort, best for

Back Sleepers
Pain
Temperature
Allergies
Bed Partner
Toss and Turn

Receive $200 Instant Gift⁴ with purchase.

Sealy SX Box Spring Foundation

488

Starting at

$200⁰⁰

Sleepy's Basics Easy Assembly Box Spring

188

Starting at

$119⁹⁹

Sleepy's Foldable Bunkie Board Foundation

101

Starting at

$89⁹⁹

Sealy Tanglewood 2.1 Plush Euro Pillowtop Mattress

Starting at

$1179⁹⁹

Plush Comfort, best for

Side Sleepers
Temperature
Pain
Bed Partner
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sherwood Monarch Box Spring Foundation

Starting at

$300⁰⁰

Kingsdown Wesley Collection Box Spring Foundation

Starting at

$325⁰⁰

Tempur-Pedic TEMPUR-Protect Breeze Mattress Protector

805

Starting at

$259⁰⁰

Beautyrest Silver BRS900 11.75" Medium Firm Mattress

1746

Starting at

$799⁹⁹

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Purecare Waterproof Encasement Box Spring Protector

Starting at

$44⁹⁹

Temperature
Allergies

Sealy Posturepedic Plus Norman II 15" Medium Euro Top Mattress

438

Starting at

$1299⁰⁰

$1399⁰⁰

$100 OFF

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Beautyrest Black Series One 14.75" Medium Pillow Top Mattress

332

Starting at

$1949⁰⁰

$2349⁰⁰

$400 OFF

Medium Comfort, best for

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

$300 ⁶ adjustable base instant gift with purchase.

Finding a twin XL foundation at an outlet can be a smart way to create a comfortable, supportive sleep setup at an affordable price. A twin XL mattress measures approximately 38 inches wide by 80 inches long, making it five inches longer than a standard twin mattress and a popular choice for taller sleepers, college dorm rooms, guest rooms and compact bedrooms. The right twin XL bed foundation helps keep the mattress properly supported, improves airflow beneath the bed and can make it easier to get in and out of bed. Outlet foundations may include traditional box springs, low-profile foundations, platform bases and adjustable-compatible options, so check the product details to confirm the foundation matches your mattress type and preferred bed height. Before choosing a twin XL outlet foundation, verify its dimensions, weight capacity, construction and compatibility with your twin XL mattress. Foam, hybrid and many innerspring mattresses typically require a sturdy, evenly supported surface, while some mattresses may have specific spacing requirements for foundation slats. A twin XL foundation with durable wood or metal construction can provide dependable support for everyday sleep, and a low-profile design may create a streamlined look while preserving space for under-bed storage. Pairing a twin XL mattress and foundation with a compatible bed frame, mattress protector and comfortable bedding can help create a complete sleep system that supports better zzz's for less.

What is a foundation? + -

A foundation is a supportive base designed to sit beneath a mattress. It can provide a stable surface and may include a solid or slatted construction.

What materials are commonly used in outlet foundations? + -

Outlet foundations may feature materials such as wood, metal or a combination of both. The specific construction varies by design.

How can a foundation complement a bedroom? + -

A foundation can create a finished look by lifting the mattress and coordinating with a bed frame, headboard or other bedroom furniture.

Can a foundation be used with a bed frame? + -

Many foundations can be paired with a compatible bed frame. Check the foundation and frame specifications to confirm that the pieces are designed to work together.

How should I care for a foundation? + -

Keep the foundation dry, avoid placing excessive items on it and periodically check that its components remain properly positioned. Follow the care instructions provided with the foundation.