9 Best Replacement Mattresses for Sofa Beds (November 2026)
The best replacement sofa bed mattresses include the ROOST SLEEP Memory Foam Sofa Bed Mattress for queen frames with gel foam, the Milliard 4.5-Inch Memory Foam Sofa Bed Mattress for a removable washable cover, and the Classic Brands 4.5-Inch Plush Cool Gel Memory for a plush full-size feel.
On this page (6 sections)
The ROOST SLEEP Memory Foam Sofa Bed Mattress is the best replacement mattress for most sofa beds in this roundup, with a 4.5-inch gel memory foam build sized 72 x 58 inches. The Milliard has a removable washable cover, while full-size picks suit frames closer to 72 x 52 or 72 x 53 inches.
A replacement only helps if it fits both the open bed and the closed sofa. Measure the frame before comparing foam feel, cover care or extra uses.
Our picks at a glance
-
1
Best for queen frames with gel foamROOST SLEEP Memory Foam Sofa Bed Mattress
9.7/10 our score
See it on Amazon -
2
Best for a removable washable coverMilliard 4.5-Inch Memory Foam Sofa Bed Mattress
9.6/10 our score
See it on Amazon -
3
Best for a plush full-size feelClassic Brands 4.5-Inch Plush Cool Gel Memory
9.4/10 our score
See it on Amazon
- 4
Check itRhyme source 4.5 Inch Cold Gel Memory Foam
Best for a 73-inch full frame - 5
Check itFerlizer Queen Sofa Bed Mattress Replacement
Best for a 72 x 60 in queen frame - 6
Check itBegonia.K 4 Inch Foldable Memory Foam Sofa
Best for folding and portable use - 7
Check itSUNYRISY Foldable Sofa Bed Replacement Mattress 72"
Best for a washable full-size cover - 8
Check itZenzy Full Sofa Bed Mattress Replacement
Best for a 72 x 52 in frame - 9
Check itLILYPELLE Sofa Bed Mattress Replacement 4 Inch
Best for a plush full-size option
Which replacement mattresses for sofa beds stand out?
The ROOST SLEEP and Milliard queen mattresses lead this group, while full-size options cover narrower frames and alternate foam builds. We compared dimensions, thickness, materials and care features against the needs of a replacement sleeper mattress.
| Product | Best for | Size | Thickness | Foam | Our score |
|---|---|---|---|---|---|
| ROOST SLEEP Memory Foam Sofa Bed Mattress | queen frames with gel foam | 72 x 58 in | 4.5 in | Gel memory foam | 9.7 |
| Milliard 4.5-Inch Memory Foam Sofa Bed Mattress | a removable washable cover | 72 x 58 in | 4.5 in | 9.6 | |
| Classic Brands 4.5-Inch Plush Cool Gel Memory | a plush full-size feel | 72 x 53 in | 4.5 in | 9.4 | |
| Rhyme source 4.5 Inch Cold Gel Memory Foam | a 73-inch full frame | 73 x 52 in | 4.5 in | 9.2 | |
| Ferlizer Queen Sofa Bed Mattress Replacement | a 72 x 60 in queen frame | 72 x 60 in | 4 in | Dual-layer memory foam | 8.9 |
| Begonia.K 4 Inch Foldable Memory Foam Sofa | folding and portable use | 72 x 53 in | 4 in | 8.7 | |
| SUNYRISY Foldable Sofa Bed Replacement Mattress 72" | a washable full-size cover | About 72 x 53 in | 4 in | 8.4 | |
| Zenzy Full Sofa Bed Mattress Replacement | a 72 x 52 in frame | 72 x 52 in | 4 in | 8.2 | |
| LILYPELLE Sofa Bed Mattress Replacement 4 Inch | a plush full-size option | 72 x 53 in | 4 in | 7.9 |
Our scores weigh specs, features and buyer feedback against what you're shopping for.
Best replacement mattresses for sofa beds by use
The right pick depends on frame size, available storage depth and the feel you want. Check the dimensions and thickness against your sofa bed before you choose.
ROOST SLEEP Memory Foam Sofa Bed Mattress: Best for queen frames with gel foam
- 4.5-inch gel memory foam
- 72 x 58 in queen dimensions
- Cooling polyester blend cover
- Folds for sofa bed use
A 4.5-inch gel memory foam mattress in queen dimensions for buyers replacing a pull-out sofa mattress. It can also work as a topper when you want extra cushioning.
Pros
- Queen dimensions stated
- Gel memory foam
- Cooling cover
Cons
- Check folded frame clearance before ordering
- Dimensions may not fit every queen sleeper
The ROOST SLEEP mattress is a queen-size replacement for buyers whose frame is close to 72 x 58 inches. Its 4.5 inches of gel memory foam and medium firmness offer a different construction from a traditional spring sleeper mattress.
The cooling polyester blend cover is designed for daily wear, and the foam is made to fold into most sleeper sofas. ROOST SLEEP also describes it as suitable for use as a topper when an existing mattress needs extra cushioning.
Measure the frame and the storage cavity before ordering. A queen label alone does not confirm that the mattress will fit every sleeper sofa.
Choose this pick when the dimensions match and you want gel memory foam in a 4.5-inch profile. If you need to compare more queen options, see our guide to the best queen sleeper sofa mattress replacement.
Milliard 4.5-Inch Memory Foam Sofa Bed Mattress: Best for a removable washable cover
- 4.5-inch, two-layer foam
- 72 x 58 in queen dimensions
- Removable machine-washable cover
- Medium-firm feel
A queen mattress with a firm polyurethane base and softer memory foam top. Its zippered cover comes off for machine washing.
Pros
- Two-layer construction
- Machine-washable cover
- Queen dimensions stated
Cons
- Check the frame cavity before choosing 4.5 inches
- Full-size frame compatibility varies
Milliard suits buyers who want a queen replacement with a removable machine-washable cover. Inside, a 3-inch firm polyurethane base sits below a 1.5-inch memory foam layer.
The mattress measures 72 x 58 x 4.5 inches and is described as medium firm. Its jacquard cover is ventilated, and the zippered design makes it easier to remove for cleaning.
That 4.5-inch thickness may be too much for a slim folding mechanism, so check your sofa's closed cavity. The queen dimensions also need to match the open frame before you buy.
Pick Milliard for a two-layer build and washable cover if its thickness fits your sofa bed. If support feel is your main concern, compare the options in our best firm sofa bed mattress guide.
Classic Brands 4.5-Inch Plush Cool Gel Memory: Best for a plush full-size feel
- 4.5-inch, two-layer foam
- 72 x 53 in full dimensions
- 2-inch gel memory foam top
- Plush feel
This full-size replacement has a plush gel memory foam top over a high-density foam base. Its dimensions suit frames close to 72 x 53 inches.
Pros
- Gel memory foam top
- Full dimensions stated
- Designed for pull-out sofa beds
Cons
- Plush feel may not suit buyers who want firmer foam
- Measure the frame before ordering
Classic Brands is the full-size pick for buyers who want a plush top layer and dimensions close to 72 x 53 inches. Its 2-inch cool gel memory foam layer sits over a 2.5-inch high-density foam base.
The brand describes the gel foam as drawing heat away from the body. The mattress is designed for pull-out sofa beds, and its stretch knit cover adds another point to check against your current mattress setup.
Its plush feel may not suit someone who prefers a firmer surface. Measure the frame before ordering, especially if your existing full mattress is a different width.
Choose it if your frame matches the stated dimensions and you prefer a plush gel foam surface. If you want a firmer feel, see our best firm sofa bed mattress picks.
Rhyme source 4.5 Inch Cold Gel Memory Foam: Best for a 73-inch full frame
- 4.5-inch, two-layer foam
- 73 x 52 in full dimensions
- 2-inch gel memory foam layer
- Vacuum packed
A full mattress that measures 73 x 52 inches, with a firm foam base and gel memory foam top. Allow 24 to 72 hours for it to regain its shape after unpacking.
Pros
- Longer full-size dimension
- Two foam layers
- Vacuum packed for transport
Cons
- Confirm the extra length fits your frame
- Expansion takes time
Rhyme source suits full frames that need a little more length, measuring 73 x 52 inches. Its 4.5-inch build pairs a 2.5-inch polyurethane base with a 2-inch gel memory foam layer.
The mattress is vacuum packed and may take 24 to 72 hours to regain its full shape. Its stated dimensions differ from a 72-inch mattress, so compare them with the frame rather than relying on the full-size label.
The brand describes the gel layer as helping absorb body heat. As with other foam picks, comfort depends on personal preference and the condition of the sleeper mechanism.
Choose this model if the extra inch of length fits your frame. If the sofa bed is a queen, compare frame dimensions with our queen sleeper sofa replacement mattress guide.
Ferlizer Queen Sofa Bed Mattress Replacement: Best for a 72 x 60 in queen frame
- 4-inch memory foam
- 72 x 60 in queen dimensions
- Dual-layer design
- Machine-washable cover
This queen replacement measures 72 x 60 inches and has a 4-inch dual-layer build. Ferlizer advises checking the closed sofa cavity and leaving at least 4.5 inches of clearance.
Pros
- Wider queen dimension
- Machine-washable cover
- Designed to fold into a sleeper frame
Cons
- Requires careful cavity measurement
- Not recommended for mechanisms that require under 3 inches
Ferlizer offers a wider queen option at 72 x 60 inches with a 4-inch dual-layer memory foam design. That width is useful only if your sleeper frame and closed storage cavity can accommodate it.
The cover is machine washable, and the mattress is designed to fold and tuck into a sofa bed. Ferlizer advises checking for at least 4.5 inches of clearance in the closed cavity, so measure before choosing this mattress.
Its stated width is 2 inches more than the 72 x 58-inch queen models in this roundup. That difference makes direct measurement especially important.
Pick Ferlizer if your frame is close to 72 x 60 inches and has enough storage depth. For more size-specific options, use the queen replacement mattress guide.
Begonia.K 4 Inch Foldable Memory Foam Sofa: Best for folding and portable use
- 4-inch memory foam
- 72 x 53 in full dimensions
- Detachable washable cover
- Foldable for storage
A 4-inch full-size mattress with a removable cover and a foldable design for storage or portable use. It can also serve as a spare floor mattress.
Pros
- Foldable design
- Cover can be removed and washed
- Full dimensions stated
Cons
- Allow 12 to 24 hours to regain thickness
- Measure for a sofa frame before ordering
Begonia.K is a portable option with a foldable design, 4-inch memory foam and full dimensions of 72 x 53 inches. Its detachable cover can be machine washed, which helps if the mattress doubles as a spare floor bed.
The brand describes the fabric as fiberglass-free and breathable. The compressed mattress may need 12 to 24 hours to regain its shape, and the instructions recommend drying the foam in sunlight to help it recover more quickly.
The foldable design may suit occasional guest use beyond the sofa. For a fixed sleeper frame, still check that the size and thickness fit its mechanism.
Choose it if portability and a washable cover matter alongside sofa bed use. If the mattress fits but needs extra cushioning, consider a queen sofa bed mattress topper after checking that the frame can still close.
SUNYRISY Foldable Sofa Bed Replacement Mattress 72": Best for a washable full-size cover
- 4-inch memory foam
- About 72 x 53 in full dimensions
- Detachable machine-washable cover
- Foldable design
This foldable full-size mattress has memory foam and a detachable cover that can be machine washed and drum dried. It can also be used on the floor or in an RV.
Pros
- Machine-washable cover
- Foldable design
- Full-size dimensions stated
Cons
- Allow 12 to 24 hours to recover after unpacking
- Confirm fit with your frame
SUNYRISY is another full-size foldable option, measuring about 72 x 53 x 4 inches. Its memory foam mattress has a detachable cover that can be machine washed and drum dried.
The mattress arrives compressed and may show wrinkles or deformation at first. Allow 12 to 24 hours for it to recover before judging its final shape.
Its stated size is close to Begonia.K's full dimensions, so cover care and your preferred setup may guide the choice. The mattress can also be used as a floor mattress or RV mat.
Pick SUNYRISY if you want a washable cover and a foldable mattress for more than one use. Before ordering, compare the thickness with the folded cavity and the dimensions with the open bed.
Zenzy Full Sofa Bed Mattress Replacement: Best for a 72 x 52 in frame
- 4-inch memory foam
- 72 x 52 in dimensions
- Removable machine-washable cover
- Designed to fold back into a couch
A 4-inch full-size replacement for frames close to 72 x 52 inches. Its removable cover can be machine washed, and the mattress is designed to fold back into a couch.
Pros
- Frame dimensions stated
- Washable cover
- Designed to fold into the sofa
Cons
- Measure the closed cavity for clearance
- Check the fit if your frame is wider
Zenzy is sized for a full frame close to 72 x 52 inches. Its 4-inch memory foam build is designed to fold back into a couch, and its removable cover is machine washable.
The brand describes the cover as breathable and the foam as CertiPUR-US certified. Zenzy recommends measuring the folded couch cavity so the mattress thickness does not prevent the sofa from closing.
This width is narrower than the 72 x 53-inch options above. That one-inch difference can matter when a sleeper frame has little extra room.
Choose Zenzy when your frame matches 72 x 52 inches and you want a washable cover. If you need standard sheet sizing, compare the mattress dimensions with our best sheets for sofa bed mattresses guide.
LILYPELLE Sofa Bed Mattress Replacement 4 Inch: Best for a plush full-size option
- 4-inch foam
- 72 x 53 in full dimensions
- Removable washable cover
- Foldable
This 4-inch full-size replacement has a removable washable cover and a foldable design. Measure your sofa bed before choosing it.
Pros
- Full dimensions stated
- Removable washable cover
- Foldable design
Cons
- Allow 24 to 72 hours to expand
- Confirm frame fit before ordering
LILYPELLE is a 4-inch full-size foam option measuring 72 x 53 inches. It has a removable washable cover and is designed to fold for use in sleeper sofas and hide-a-beds.
The mattress arrives vacuum packed and may need 24 to 72 hours to expand. LILYPELLE advises measuring the sofa before ordering, which matters if your existing mattress has compressed or changed shape.
Its stated size matches several other full options here, so compare cover care and thickness against the alternatives. The brand also describes it as suitable for RVs, campers, boats, futons and floor use.
Choose it if your frame fits the dimensions and you want a washable cover. If your existing mattress still fits but feels too thin, a queen sofa bed mattress topper may be another route to consider.
How do you choose a sofa bed mattress replacement?
Measure the open frame, the mattress cavity and the closed sofa before deciding on size or thickness. A mattress can match the sleeping surface yet still keep the sofa from folding shut.
Start with the mattress dimensions, not just the words “queen” or “full.” This group includes queen options at 72 x 58 and 72 x 60 inches, plus full options from 72 x 52 to 73 x 52 inches.
What size sofa bed mattress replacement fits your frame?
The best sofa bed mattress replacement is the one that matches your frame's actual length and width. Measure the current mattress and the frame from seam to seam, then compare those numbers with the replacement dimensions.
If the current mattress has sagged or lost shape, measure the frame itself as well. For queen sleeper sofas, our queen replacement mattress comparison covers more size-focused choices.
How thick should a replacement mattress be?
Choose a thickness that fits the mechanism's storage space when folded. The picks here range from 4 to 4.5 inches, and a half-inch difference can matter in a tight sofa cavity.
Check the sofa maker's guidance if you have it, then measure the closed cavity. A thicker mattress may feel more substantial, but the mechanism still needs room to fold without pinching or forcing the frame.
Should you choose foam or gel memory foam?
Foam construction varies by model, so compare layers and firmness descriptions rather than assuming all memory foam feels alike. Some picks here use a firm base under a softer memory foam or gel layer.
Gel memory foam appears in the ROOST SLEEP, Classic Brands and Rhyme source options. The brands describe cooling benefits, but your experience can vary with room temperature, sheets and personal comfort.
When is a topper a better choice than a replacement?
A topper may make sense when the current mattress still fits and the frame closes safely, but you want added cushioning. A replacement is the better route when the old mattress is worn, damaged or the wrong size.
Measure the added height before choosing a topper. Our guide to the best queen sofa bed mattress toppers can help you compare that option.
What should you check before buying a replacement mattress?
Confirm the dimensions, thickness, cover care and unpacking time before choosing. Those details affect fit and setup more than a broad size label does.
Check whether the cover removes for washing if easy care matters. The picks vary: some have washable zippered covers, while others focus on a cooling cover or foldable design.
Also plan for expansion after unpacking. Some compressed mattresses need 12 to 72 hours to regain shape, so avoid judging the feel immediately after opening.
Do you need special sheets for a sofa bed mattress?
Use sheets that fit the mattress length, width and thickness, with enough pocket depth to stay in place. Sofa bed sizes can differ from standard mattress dimensions, so compare the exact measurements.
A close-fitting sheet also helps reduce bunching when the bed folds. Our guide to sheets for sofa bed mattresses covers sizing and fit.
What is the difference between a sofa bed and a sleeper sofa?
Both terms can refer to seating that converts into a bed, though the mechanism can vary by design. A traditional sleeper sofa often stores a fold-out mattress inside, while some sofa beds use the seat itself as part of the sleeping surface.
See what a sofa bed is and how it turns into a bed and what a sleeper sofa is and how its bed folds out before ordering a replacement. Make sure your furniture has a separate mattress that can be removed.
Can you use a replacement mattress for twin or full sleeper sofas?
Yes, if the replacement's dimensions match the frame. Twin and full labels alone may not capture small differences in length or width, so compare measurements before choosing.
For a narrower setup, see our best twin sleeper sofa mattress guide. For a full sleeper, our full sleeper sofa mattress guide focuses on that size.
Can a thicker mattress stop a sofa bed from closing?
Yes, a mattress that exceeds the mechanism's available space can make folding difficult or prevent the sofa from closing. Measure the storage cavity and check the furniture maker's thickness guidance before buying.
If a hinge or folding mechanism is worn, mattress thickness may not be the only issue. See our guide to sofa bed hinges if the frame itself needs attention.
More guides on this topic
- Best Queen Sleeper Sofa Sheets
Which replacement sofa bed mattress should you choose?
Pick ROOST SLEEP if your queen frame measures close to 72 x 58 inches and you want 4.5-inch gel memory foam. Choose Milliard for a removable washable cover, or select a full-size mattress only after matching its exact dimensions and thickness to your frame.
The best replacement mattress for sofa bed comfort is the one that fits both the open frame and closed cavity. Measure first, then choose by foam layers, cover care and the feel you prefer.
Our top 3 picks at a glance
-
1
Best for queen frames with gel foam
ROOST SLEEP Memory Foam Sofa Bed Mattress
9.7/10 our score
See it on Amazon -
2
Best for a removable washable cover
Milliard 4.5-Inch Memory Foam Sofa Bed Mattress
9.6/10 our score
See it on Amazon -
3
Best for a plush full-size feel
Classic Brands 4.5-Inch Plush Cool Gel Memory
9.4/10 our score
See it on Amazon
Frequently asked questions
How do I measure for a sofa bed replacement mattress?
Measure the existing mattress or the open frame from end to end and side to side, then check the thickness the mechanism can hold. Also measure the storage cavity with the bed folded.
A mattress that fits the open frame may still be too thick to let the sofa close.
Can I leave a replacement mattress in the sofa bed when it is closed?
Often, but it depends on the frame and mattress thickness. Check the sofa maker's guidance and measure the closed cavity before buying.
Some 4.5-inch mattresses may not fit mechanisms made for thinner foam, and an overstuffed frame can be hard to close.
Is memory foam a good choice for a sleeper sofa?
Memory foam can be a practical replacement because several options here use foam layers and are designed to fold with a sofa bed. Feel varies by construction, so compare thickness and firmness descriptions, then check that the mattress fits your frame.
It may help relieve pressure, but it does not promise pain relief.
What if my sofa bed mattress feels too firm?
A plush or gel memory foam model may feel different from a worn spring mattress, but comfort is personal. Check dimensions and folding clearance first.
A topper can add cushioning when the current mattress still fits and the frame closes safely.
Do sofa bed replacement mattresses need special sheets?
Use sheets sized for the mattress dimensions, and check pocket depth against its thickness. A close fit helps keep fabric from pulling off as the sleeper sofa folds.
See our guide to best sheets for sofa bed mattresses for options and fit details.
