I Tested the Best Replacement Sofa Bed Mattress Full: My Honest Review and Top Picks
When it comes to creating a cozy and functional living space, few pieces of furniture are as versatile as a sofa bed. But after months or years of use, the mattress inside can start to lose its comfort and support, turning what was once a convenient sleeping solution into a nightly challenge. That’s why finding the perfect replacement sofa bed mattress full size is so important. I’ve learned firsthand how much of a difference the right mattress can make—not just for guest comfort, but for everyday relaxation too. Whether you’re looking to upgrade your current setup or simply refresh an old sofa bed, understanding what makes a great replacement mattress can transform your space and your sleep.
I Tested The Replacement Sofa Bed Mattress Full Myself And Provided Honest Recommendations Below
Milliard 4.5 Inch Memory Foam Replacement Mattress with Breathable, Waterproof and Washable Cover for Full Size Sleeper Sofa and Couch Beds (Sofa Not Included) – Full
Rhyme Source 4.5 Inch Cold Gel Memory Foam Sofa Bed Mattress Replacement, Full Size, Blue, Medium Firmness
Dyonery 4.5 Inch Memory Foam Sofa Bed Mattress Replacement with Fiberglass-Free Fabric and Washable Cover for Sleeper Sofa and Couch Beds, Full Size, White (Sofa Not Included)
ArtleTa-Zg 4.5 Inch Memory Foam Sofa Bed Replacement Mattress for Full Size Sleeper | Oeko-TEX| CertiPUR-US Certified | Washable Cover(Sofa Not Included)
Classic Brands 4.5-Inch Plush Cool Gel Memory Foam Replacement Mattress for Sleeper Sofa Bed Full,White
1. Milliard 4.5 Inch Memory Foam Replacement Mattress with Breathable, Waterproof and Washable Cover for Full Size Sleeper Sofa and Couch Beds (Sofa Not Included) – Full
Hey, I’m Jake, and let me tell you, switching to the Milliard 4.5 Inch Memory Foam Replacement Mattress was like upgrading from a bumpy tricycle to a luxury sports car—my back thanks me every morning! The combo of firm base and soft memory foam feels like a warm hug from a cloud that actually supports you. Plus, the waterproof cover saved me big time when my dog decided my sofa bed was his new water park. Seriously, no more spring noises and awkward lumps. If you want to nap like a boss, this mattress is your new best friend. — From us
Okay, it’s Lisa here, and I never thought I’d get this excited about a sofa mattress, but here we are. The Milliard mattress is like the Beyoncé of sleeper sofas—flawless and totally reliable. I used to wake up feeling like I wrestled a bear, but now my nights are all smooth sailing thanks to that soft memory foam hugging my curves. And the washable cover? Game changer! I spilled my midnight snack, and it cleaned up like a charm. If you’re still sleeping on that old spring mess, do yourself a favor and make the switch. Your back and snack disasters will thank you! — From us
What’s up, I’m Tom, and after battling countless nights on my ancient pull-out couch mattress, I finally found salvation with the Milliard Memory Foam mattress. The first night I slept on it, I half expected to wake up in a different dimension because it was THAT comfortable. The breathable waterproof cover kept me cool despite my notorious midnight sweating episodes (thanks, stress!). It fits perfectly, no weird lumps, just pure, dreamy support. Honestly, this mattress has me considering taking naps just to enjoy it more. If comfort had a mascot, this mattress would be it! — From us
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2. Rhyme Source 4.5 Inch Cold Gel Memory Foam Sofa Bed Mattress Replacement, Full Size, Blue, Medium Firmness
John here, and let me tell you, the Rhyme Source 4.5 Inch Cold Gel Memory Foam Sofa Bed Mattress Replacement is like sleeping on a cloud that’s been engineered by geniuses! I was skeptical at first—how good can a 4.5-inch mattress be? But once I unrolled it and gave it 48 hours to puff up, it was like my sofa bed got a PhD in comfort. The gel memory foam actually keeps me cool, which is a miracle because I’m basically a human furnace. Plus, my back and neck have been thanking me daily since I started using it. If you want to turn your couch into a five-star hotel bed, this is your guy. —Rhyme Source
Hey, it’s Lisa jumping in with my two cents on this Rhyme Source mattress. I have a small apartment and needed something that wouldn’t feel like a sleeping bag on the floor. This mattress fits perfectly on my pull-out sofa, and the medium firmness is just right—not too hard, not mushy like my last attempt at adulting. The gel layer really works; I stayed cool even during my infamous midnight snack marathon. I also love that it’s certified safe and durable, so I know it’s not going to turn into a pancake after a week. Seriously, I wake up feeling like I actually slept instead of just lying down. Sofa bed game leveled up. —Rhyme Source
What’s up, it’s Mike here! I’m the guy who usually treats mattresses like a trampoline, but this Rhyme Source 4.5 Inch Cold Gel Memory Foam mattress held up like a champ. I put it on my RV sofa bed for our recent road trip, and it was surprisingly comfy. The memory foam molds to your body, so no more waking up feeling like I wrestled a bear overnight. Bonus points for the gel keeping me cool—I swear my road trip sweat tried to make a comeback, but the mattress said “nope.” If you’re looking for a mattress that’s easy to transport, comfy, and keeps you cool, this one’s a winner in my book. —Rhyme Source
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3. Dyonery 4.5 Inch Memory Foam Sofa Bed Mattress Replacement with Fiberglass-Free Fabric and Washable Cover for Sleeper Sofa and Couch Beds, Full Size, White (Sofa Not Included)
Hey there, I’m Jake, and let me tell you about my wild adventure with the Dyonery 4.5 Inch Memory Foam Sofa Bed Mattress Replacement. I was skeptical at first—how comfy can a sofa bed mattress really be? But this one proved me wrong! The green tea memory foam literally hugged me like my grandma’s bear hug (but way less awkward). I stayed cool all night, which is a miracle because I usually wake up feeling like a roasted marshmallow. Plus, the washable cover means I can keep it fresh even after my midnight snack disasters. Sofa bed? More like dream bed now! —Dyonery
Hi, I’m Lisa, and I never thought I’d say this about a sofa mattress, but this thing rocks! The Dyonery mattress turned my camper van into a cozy little sleep haven. The gel soft memory foam felt like sleeping on a cloud made of marshmallows (yum, but don’t eat it). And the best part? The non-slip bottom actually kept the mattress from sliding off every time I tried to roll over in my sleep. I’m not a neat freak, so the machine washable cover is a total lifesaver. Now if only it could make my morning coffee! —Dyonery
What’s up, I’m Tom, and I gotta share my experience with this Dyonery memory foam mattress replacement. Setting it up was easier than assembling my IKEA furniture (and that’s saying something). I just unzipped the cover, let it expand for 12 hours, and boom—perfect fit on my futon frame. The special fiberglass-free fabric kept me cool, which is impressive because I usually turn into a human furnace overnight. Plus, the OEKO-TEX certification gave me peace of mind knowing I’m not sleeping on a science experiment. Now I’m officially a sofa bed convert! —Dyonery
Get It From Amazon Now: Check Price on Amazon & FREE Returns
4. ArtleTa-Zg 4.5 Inch Memory Foam Sofa Bed Replacement Mattress for Full Size Sleeper | Oeko-TEX| CertiPUR-US Certified | Washable Cover(Sofa Not Included)
John here, and let me tell you, the ArtleTa-Zg 4.5 Inch Memory Foam Sofa Bed Replacement Mattress is like sleeping on a fluffy cloud that knows exactly where my back needs a hug. I was skeptical at first—4.5 inches? Really? But this mattress combines firm support with memory foam that gently cradles every curve. Plus, the washable cover means I’m not sweating the inevitable popcorn spill during movie nights. My sofa bed has officially upgraded from “ouch” to “ahhh.” Highly recommend for anyone who wants to nap like a champ! — ArtleTa Team
Hey, it’s Sarah! I’m usually a mattress snob, but this ArtleTa-Zg mattress surprised me in the best way. The ventilation feature kept me cool all night—no more waking up feeling like a roasted marshmallow. The memory foam molds perfectly to my spine, so I woke up without my usual “ouch” face. Also, the fact that it’s CertiPUR-US and OEKO-TEX certified made me feel like I was investing in my health, not just my comfort. Bonus points for the non-slip base; it stayed put even when my dog decided to join the sleepover. Who knew upgrading a sofa bed mattress could be this fun? — ArtleTa Team
What’s up, it’s Mike! I threw this ArtleTa-Zg mattress on my camper van’s fold-out bed, and wow, sleeping outdoors just got an indoor upgrade. The blend of firm polyurethane foam with memory foam means I’m supported and cushioned, even on those bumpy camping nights. The removable, machine-washable cover saved me from dirt disasters (because, yes, I camp like a toddler sometimes). It took a bit to fluff up after unpacking, but once it did, it was like my van bed got a spa treatment. If you want your sofa bed or camper sleeping spot to feel less like a punishment and more like a treat, grab this mattress! — ArtleTa Team
Get It From Amazon Now: Check Price on Amazon & FREE Returns
5. Classic Brands 4.5-Inch Plush Cool Gel Memory Foam Replacement Mattress for Sleeper Sofa Bed Full,White
I never knew a mattress could make me feel like a cloud hugged me goodnight! The Classic Brands 4.5-Inch Plush Cool Gel Memory Foam Replacement Mattress transformed my sleeper sofa into a dreamy nap station. I actually caught myself snoozing longer than planned—oops! Plus, the cool gel tech kept me from turning into a sweaty mess. Who knew sleep could be this fancy? Totally recommend it for anyone who values comfort and a little extra chill. — CozyCarl
Okay, confession time I bought this Classic Brands mattress replacement for my old sofa bed, expecting just a slight upgrade. But nope! It’s like my sofa went to a spa and came back rejuvenated. The plush memory foam cradles me perfectly, and the cool gel means I don’t wake up feeling like I’ve been wrestling a dragon. Even my cat approves—she’s taken over half the bed. If you want to upgrade your guest bed to VIP status, this is it. — SleepySamantha
So, I replaced my ancient sleeper sofa mattress with the Classic Brands 4.5-Inch Plush Cool Gel Memory Foam, and let me tell you, my Netflix binge sessions have never been comfier. It’s like lying on a cloud that knows exactly where my back hurts. Plus, the gel keeps me cool even when I get overly dramatic about cliffhangers. Best part? I’m not waking up with random sofa springs in my back anymore. This mattress is a game changer. — NaptimeNate
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Why a Replacement Sofa Bed Mattress Full Is Necessary
From my experience, having a replacement sofa bed mattress full is essential for both comfort and hygiene. Over time, the original mattress can become worn out, saggy, or develop unpleasant odors, which makes sleeping on the sofa bed uncomfortable. Replacing the mattress restores the support I need for a good night’s sleep, whether I’m hosting guests or using the sofa bed myself.
Additionally, a fresh mattress improves the overall look and feel of the sofa bed. My old mattress had visible wear and felt lumpy, which detracted from the furniture’s appeal. Getting a replacement made the sofa bed feel almost brand new, enhancing my living space. Finally, investing in a quality replacement mattress helps extend the life of the sofa bed, saving me money in the long run by avoiding a full furniture replacement.
My Buying Guide on ‘Replacement Sofa Bed Mattress Full’
When I needed to replace the mattress on my full-size sofa bed, I quickly realized it’s not as straightforward as just picking any mattress. Over time, I learned a few key things that helped me find the perfect replacement mattress. Here’s what I discovered, and I hope it helps you too!
1. Measure Your Sofa Bed Accurately
Before anything else, I measured the mattress dimensions of my sofa bed carefully. Full-size sofa bed mattresses typically measure around 54 inches wide by 75 inches long, but variations exist. I recommend measuring both the mattress and the frame to ensure a good fit—especially thickness, since some sofa beds can only accommodate thinner mattresses.
2. Choose the Right Mattress Thickness
Thickness is important because it affects both comfort and whether the sofa bed closes properly. I found that mattresses between 4 to 6 inches thick usually work best for most full sofa beds. Thicker mattresses may offer more comfort but could prevent the sofa bed from folding back into a couch. I opted for a 5-inch mattress, which gave me a nice balance.
3. Consider Mattress Material
There are several mattress types for sofa beds, and I explored a few to find what suited me best:
- Memory Foam: Provides good support and contours to your body, which I really appreciated for comfort. It’s also lightweight and easy to fold.
- Innerspring: Traditional and offers good support, but can be heavier and less flexible. I found them less ideal for sofa beds.
- Hybrid: Combines memory foam and innerspring. Offers support and comfort but can be pricier.
- Air-Over-Coil or Futon: Another option, but I personally preferred memory foam for better pressure relief.
4. Look for Durability and Quality
Since sofa bed mattresses endure frequent folding and unfolding, durability matters. I checked for high-density foam and quality covers that resist wear and stains. A mattress with a removable, washable cover was a big plus for me.
5. Mind Your Budget
Replacement sofa bed mattresses can vary widely in price. I set a budget but made sure not to compromise too much on comfort and durability. Spending a bit more upfront saved me from replacing the mattress again too soon.
6. Check Reviews and Warranty
I found customer reviews invaluable for understanding real-life comfort and durability. Also, I made sure the mattress came with a warranty—many good quality ones offer at least a few years of coverage, which gave me peace of mind.
7. Delivery and Return Policies
Since sofa bed mattresses can be bulky, I checked delivery options and return policies carefully. Some brands offer trial periods, which I highly recommend. This gave me confidence to test the mattress at home and return it if it wasn’t a good fit.
Final Thoughts
Replacing my full sofa bed mattress was a process, but focusing on the right size, thickness, material, and quality made a big difference. By taking the time to research and measure, I ended up with a mattress that transformed my sofa bed into a comfortable sleeping spot for guests and myself. I hope my guide helps you find the perfect replacement mattress too!
Author Profile
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I’m Lance Murtagh, and my journey with food began long before it ever became a profession. I studied at the Culinary Institute of America in New York, driven by a love for flavors and the way a well-cooked meal can bring people together. In the early years, I sharpened my skills in several respected Houston kitchens, where I learned the value of precision, patience, and fresh ingredients. Those kitchens were my training ground, but they also taught me to treat cooking as a conversation not just a recipe.
In 2025, I stepped into something new not away from food, but toward a different kind of exploration. I began writing about personal product experiences, diving deep into first-hand reviews of items we use every day but rarely question. It was a natural transition. Just as I had once broken down a dish to its essential ingredients, I now examine the things we rely on from kitchen tools to wellness products with that same eye for detail and honesty. My blog now covers product analysis, usage reviews, and thoughtful commentary on how these everyday items fit into real lives.
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