Under Mattress

Find the right Under Mattress essentials to complete your sleep setup. Explore options from Mattress Firm to help create a comfortable, supportive space for rest and relaxation.

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Sleepy's Deluxe Comfort Cool Mattress Protector

4179

Starting at

$169⁹⁹

Temperature
Allergies

Save $150 when you bundle¹⁰.

Sleepy's Basic Box Spring Foundation

10608

Starting at

$169⁹⁹

Sleepy's Basics Waterproof Mattress Protector

2492

Starting at

$69⁹⁹

Temperature
Allergies

Save $50 when you bundle¹⁰.

Sleepy's Universal Box Spring Foundation

6346

Starting at

$249⁹⁹

Sleepy's Bunkie Board

3307

Starting at

$109⁹⁹

Tempur-Pedic TEMPUR-Protect Breeze Mattress Protector

802

Starting at

$259⁰⁰

Serta Perfect Sleeper Charlotte 2.0 Medium Euro Top Mattress

2615

Starting at

$599⁹⁹

$999⁹⁹

$400 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

Tempur-Pedic Charcoal Box Spring Foundation

1346

Starting at

$380⁰⁰

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

3631

Starting at

$2029⁷⁷

$2899⁰⁰

$869 OFF

Medium Comfort, best for

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

Tulo Bamboo 12" Medium Plush Green Tea Memory Foam Mattress

5555

Starting at

$429⁹⁹

$1019⁹⁹

$590 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

$859⁹⁹

$1999⁹⁹

$1140 OFF

Extra Firm Comfort, best for

Back, Stomach Sleepers
Temperature
Pain
Bed Partner
Toss and Turn

FREE ADJUSTABLE BASE ³ with code ELEVATE

Bedgear Dri-Tec Mattress Protector

150

Starting at

$189⁹⁹

Temperature
Allergies

Beautyrest Silver BRS900 11.75" Medium Firm Mattress

1745

Starting at

$669⁹⁹

$849⁹⁹

$180 OFF

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

Bedgear StretchWick Mattress Protector

155

Starting at

$129⁹⁹

Temperature
Allergies

Beautyrest Silver BRS900 12" Plush Mattress

1140

Starting at

$729⁹⁹

$1699⁹⁹

$970 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

Sleepy's Basics Metal Platform Bed

111

Starting at

$161⁴⁸

$189⁹⁹

$29 OFF

Allerease Ultimate Mattress Protector

337

Starting at

$39⁹⁹

Temperature
Allergies

Tulo Gel Memory Foam Zoned Support Mattress Topper

122

Starting at

$87⁹⁹

$129⁹⁹

$42 OFF

Medium Comfort,

Temperature

Beautyrest Black Series Three 15" Firm Mattress

2224

Starting at

$2849⁰⁰

$3449⁰⁰

$600 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

$300 ⁶ adjustable base instant gift with purchase.

Purple Restore 11.5" Soft Hybrid Mattress

1662

Starting at

$2700⁰⁰

$3399⁰⁰

$699 OFF

Plush Comfort, best for

Side Sleepers
Pain
Allergies
Bed Partner
Toss and Turn
Temperature

Kingsdown Crown Imperial Box Spring Foundation

Starting at

$274⁹⁹

Beautyrest BR800 Greenwood 10.5" Firm Mattress

3404

Starting at

$949⁹⁹

Firm Comfort, best for

Back, Stomach Sleepers
Bed Partner
Toss and Turn
Temperature
Pain

Beautyrest BR800 Greenwood 11.5" Medium Firm Mattress

3223

Starting at

$999⁹⁹

Medium Comfort, best for

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

Sealy Posturepedic Pro Lacey II 15" Medium Euro Top Mattress

475

Starting at

$2749⁰⁰

Medium Comfort, best for

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

FREE ADJUSTABLE BASE ³ with code ELEVATE

The space under your mattress plays an important role in comfort, support and mattress performance. A mattress should rest on a sturdy, properly sized foundation, platform bed or adjustable base designed to support its weight and the sleepers using it. Placing a mattress directly on the floor may restrict airflow, increase exposure to dust and moisture and make it harder to get in and out of bed. Before setting up your mattress, check the manufacturer’s guidelines for slat spacing, center support and foundation compatibility, since the right bed frame can help prevent sagging and protect your mattress warranty. A breathable mattress protector adds another layer of defense against spills, allergens and everyday wear while allowing the mattress to maintain its intended feel. Under-mattress storage can help maximize bedroom space, especially with a bed frame that includes built-in drawers or enough clearance for storage containers. Keep the area under your bed clean, dry and free of sharp objects that could damage the mattress, foundation or bed frame. Avoid overcrowding the space, blocking ventilation or storing items that attract moisture and pests. Regularly vacuuming beneath the bed and checking for signs of condensation can support a fresher sleep environment. If you are replacing an old mattress, consider the mattress size, bed frame dimensions, foundation type and available under-bed clearance together to create a stable, comfortable sleep setup that supports better zzz's.

What can go under a mattress? + -

Common options include a box spring, foundation, platform bed, adjustable base or bunkie board. Each option has a different design and setup, so choose one that fits your mattress and bedroom style.

What is the difference between a box spring and a foundation? + -

A box spring typically uses a spring-based interior, while a foundation usually has a solid or slatted structure. Both are designed to sit beneath a mattress, but their construction and appearance can vary.

Can I use an adjustable base under any mattress? + -

Many foam, hybrid and innerspring mattresses are designed to pair with adjustable bases. Always review the mattress and base details to confirm they are compatible before setting them up together.

How do I care for the area under my mattress? + -

Keep the space clean and free of clutter, and follow the care instructions for your foundation, base or bed frame. Periodically inspect the components and clean them according to the manufacturer's recommendations.

How can I choose the right foundation for my bedroom? + -

Consider your mattress type, preferred bed height, bedroom design and desired features. Options range from streamlined platform foundations to adjustable bases with customizable settings.