Height 42 Mattresses

Shop Height 42 Mattresses to explore options for your bedroom and compare mattresses by size, style and comfort preference. Find choices that can help you create a sleep space that fits your needs, with delivery and support from Mattress Firm.

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Nectar Classic 12" Firm Memory Foam Mattress

231

Starting at

$899⁰⁰

$1399⁰⁰

$500 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

Sleepy's Signature Adjustable Base

Starting at

$749⁹⁹

Save $299 with qualifying mattress purchase. Code: ELEVATE

Sleepy's Signature Platform Frame

Starting at

$189⁹⁹

Sealy Ease Adjustable Base

5046

Starting at

$949⁰⁰

Tempur-Pedic TEMPUR-Ergo 3.0 Adjustable Base

3704

Starting at

$1499⁰⁰

$1599⁰⁰

$100 OFF

Sleepy's Deluxe Adjustable Base

Starting at

$999⁹⁹

Save $299 with qualifying mattress purchase. Code: ELEVATE

Tulo Bamboo 10" Medium Green Tea Memory Foam Mattress

5555

Starting at

$379⁹⁹

$889⁹⁹

$510 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

$429⁹⁹

$1019⁹⁹

$590 OFF

Medium Comfort, best for

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

Sleepy's Elite Adjustable Base

1129

Starting at

$1199⁹⁹

Save $299 with qualifying mattress purchase. Code: ELEVATE

Tulo Bamboo 8" Medium Green Tea Memory Foam Mattress

5555

Starting at

$249⁹⁹

$609⁹⁹

$360 OFF

Medium Comfort, best for

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

Tulo Lavender 6" Firm Memory Foam Mattress

217

Starting at

$319⁹⁹

Firm Comfort, best for

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

Tulo Bamboo 6" Firm Green Tea Memory Foam Mattress

5558

Starting at

$729⁹⁹

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

Nectar Premier 13" Medium Memory Foam Mattress

486

Starting at

$999⁰⁰

$1499⁰⁰

$500 OFF

Medium Comfort, best for

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

Sleepy's 10" Medium Memory Foam RV Mattress

176

Starting at

$549⁹⁹

$899⁹⁹

$350 OFF

Medium Comfort, best for

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

Nectar Luxe 14" Medium Memory Foam Mattress

238

Starting at

$1649⁰⁰

$2249⁰⁰

$600 OFF

Medium Comfort, best for

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

Sleepy's Basics Metal Platform Bed

111

Starting at

$161⁴⁸

$189⁹⁹

$29 OFF

Sleepy's 8" Medium Memory Foam RV Mattress

132

Starting at

$529⁹⁹

$799⁹⁹

$270 OFF

Medium Comfort, best for

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

Sierra Sleep By Ashley Chime 12" Hybrid Mattress

1927

Starting at

$519⁹⁹

$1749⁹⁹

$1230 OFF

Plush Comfort, best for

Side Sleepers
Pain
Bed Partner
Toss and Turn

Sierra Sleep By Ashley Chime 12" Memory Foam Mattress

468

Starting at

$1574⁹⁹

Plush Comfort, best for

Side Sleepers
Pain
Bed Partner
Toss and Turn

Sleepy's Hybrid Clearance 14" Plush Mattress

449

Starting at

$447⁵⁰

$1789⁹⁹

$1342 OFF

Plush Comfort, best for

Side Sleepers
Temperature
Toss and Turn
Pain

FREE ADJUSTABLE BASE ³ with code ELEVATE

Sleepy's Deluxe Platform Frame

442

Starting at

$299⁹⁹

Nectar Classic 12" Firm Hybrid Mattress

108

Starting at

$849⁰⁰

$1199⁰⁰

$350 OFF

Firm Comfort, best for

Back, Stomach Sleepers
Pain
Bed Partner
Temperature
Toss and Turn

Sleepy's Foldable Bunkie Board Foundation

101

Starting at

$119⁹⁹

Sleepy's Signature Mixed Material Wood Metal Modern Bed

Starting at

$499⁹⁹

Hollywood Bed Frame Enforce Platform Frame

304

Starting at

$219⁹⁹

Purple RestorePlus 13" Firm Hybrid Mattress

1667

Starting at

$2540⁰⁰

$3099⁰⁰

$559 OFF

Firm Comfort, best for

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

Mattresses listed under Height 42 Mattresses are generally intended for specialized sleep setups rather than standard twin, queen or king frames. In many cases, “42” refers to a mattress width of approximately 42 inches, with common dimensions measuring 42 inches wide by 80 inches long or 42 inches wide by 84 inches long. These mattresses may be selected for bariatric bed frames, home-care environments, custom RVs, campers, truck sleepers or other spaces that require a wider-than-twin sleep surface without the full width of a standard bed. Because sizing can vary by manufacturer and application, measure the available frame from inside edge to inside edge, then confirm the mattress length, width and profile before ordering. A difference of even a few inches may prevent the mattress from fitting properly, especially in an RV platform, built-in bunk or adjustable medical bed. It is also important to distinguish mattress width from mattress height. A 42-inch-wide mattress may have a profile of approximately six to 12 inches, while a mattress described as 42 inches high would be an entirely different type of product. Review the product specifications carefully, including the finished dimensions, recommended foundation, weight capacity and clearance requirements. For a longer sleeping surface, explore [Firm Height 84 Mattresses], keeping in mind that both the frame and bedding need to accommodate the extended length.

The right construction depends on how the mattress will be used and what kind of support the sleeper needs. High-density support foam can provide a stable, even foundation while reducing motion transfer, which may be useful in a shared room or a moving vehicle. Gel-infused memory foam can offer a contouring feel with a surface designed to help manage heat, while a hybrid design may combine pressure-relieving foam with pocketed coils for added responsiveness and edge support. Some specialized mattresses include reinforced borders, firmer support zones or pressure-redistribution features, including designs intended to reduce pressure around the heels and other sensitive areas. These details can matter for people who spend extended periods in bed, move less easily or need a sleep surface that is easier to reposition on. Mattress firmness is personal, but a firmer feel is often considered when a sleeper wants more resistance under the body, easier movement across the surface or dependable support for a heavier load. Comfort and support are not determined by firmness alone, so consider body weight, preferred sleep position, mobility, pressure points and whether the mattress will be used every night or only occasionally. Medical and bariatric applications may have specific safety requirements, and some 42-inch-wide mattresses are designed for heavy-duty frames with stated weight capacities in the range of 500 to 600 pounds. Capacity ratings can differ, and they may refer to the combined weight of the sleeper, bedding and any equipment, so confirm the manufacturer’s guidance before purchase. A qualified healthcare professional, home-care specialist or equipment provider can help identify the appropriate setup when the mattress is being used for a medical need.

A 42-inch mattress can be a practical choice for someone creating a more comfortable sleep space in a custom environment. An RV owner may use one to replace a narrow or worn mattress while preserving valuable floor space, and a person outfitting a guest room or caregiver area may appreciate the additional width compared with a twin. These mattresses can also suit custom sleeper cabins, compact apartments with built-in platforms or other spaces where standard dimensions leave gaps or limit movement. They are less typical as a surprise gift because fit, firmness and frame compatibility are highly specific, but they may be a thoughtful purchase for a family member upgrading a custom RV, a loved one setting up a home-care room or someone preparing a dedicated guest space. Before adding sheets or accessories, check the mattress profile so fitted bedding has enough depth without bunching at the corners. In a vehicle, measure around wheel wells, cabinets and wall angles, and verify that the mattress can be moved through doors and access points. A mattress that fits the platform may still be difficult to install if the route into the space is tight. During warmer weather and the cooler months alike, breathable bedding, moisture-managing protectors and adequate ventilation beneath the mattress can help maintain a fresher sleep environment. Allow a new mattress to expand fully according to its care instructions, inspect it for proper placement and avoid folding a model that is not designed to bend. With careful measurements and a clear understanding of the intended use, Height 42 Mattresses can provide a wider, supportive sleep surface for specialized frames, custom travel spaces and thoughtfully designed rooms.

What is a Height 42 mattress? + -

A Height 42 mattress is designed with a total profile of approximately 42 inches, including its comfort layers, support core and other built-in components. Its taller design can create a more substantial look in the bedroom.

What materials are used in Height 42 mattresses? + -

Height 42 mattresses may feature materials such as memory foam, latex, individually wrapped coils or a combination of these. Check each mattress description for details about its layers and construction.

What comfort options are available for Height 42 mattresses? + -

Height 42 mattresses can come in a range of comfort feels, including plush, medium and firm. Choosing among them depends on your preferred level of cushioning and support.

Do Height 42 mattresses have special design features? + -

Some Height 42 mattresses include features such as quilted covers, cooling fabrics, zoned support layers or reinforced edges. Available features vary by mattress design.

How can I style a bedroom with a Height 42 mattress? + -

Pair a Height 42 mattress with bedding and a headboard that complement its taller profile. Deep-pocket sheets, appropriately sized blankets and low-profile bedroom furniture can help create a balanced look.