Platinum Sofa Bed Mattress (4″)


Starting at $345.00

Our Platinum quality sofa bed mattress (foam density—2.5 lbs. per cu. ft.) goes all out. It’s the perfect choice for the heavier weight sleeper. Available in 4-inch thickness and all custom sizes. QuickShip available in 4″ thick: 52×72, 54×72 and 60×72.
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$ (Price reflects size and cut, if present. ALWAYS FREE SHIPPING!)

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Click the left image below for length & width, or the right image for thickness.
How to Measure Sofa Bed Mattress Dimensions
How to Measure Sofa Bed Mattress Thickness

*If your mattress is irregularly shaped or sized, and you don’t see the measurements you need, call us at 888.889.2812.



Our “Platinum” premium quality sofa bed replacement mattress is made with polyurethane foam with a density of 2.5 lbs. per cu. ft., which is specifically designed for the heavier weight sleeper. Like our Gold mattress, the mattress cover of this item is sewn with a tape edge, which virtually eliminates unwanted cover shift from folding and unfolding, again and again. Because of its density, this sofa replacement mattress is only available in a 4-inch thickness.

Using our Platinum mattress, your guests won’t feel the bars of your sofa bed mechanism. We haven’t yet found a sofa bed manufacturer, bedding shop, or other replacement mattress manufacturer that uses polyurethane foam that matches the quality of the foam we use in this mattress.

When you sleep on a sofa bed with our Platinum mattress, you won’t believe how comfortable it is. In fact, you may even prefer it to your current bedroom mattress. This mattress can stay stored inside your hide a bed for quite some time without use, and will pop open as if it were brand new when it’s needed.

  • Support—The majority of sofa bed mechanisms are made for a 4-inch mattress. Our Platinum model offers the best support available by using a 2.5 high density urethane foam core. This hide a bed mattress model is designed to hold up and support your body. Most of our competition uses 1.5 density support foams at best.
  • “What Bar?”—Our sofa bed mattresses won’t bottom out, even with 2 people weighing over 250 lbs. We’ve increased the compression in our Platinum model to create a firm, supportive feel. Even in a 4-inch thickness, it’s designed to hold up your body so you never feel the sofa bed mechanism underneath.
  • Durability—We designed the Platinum couch mattress model to stand up to the rigors of the sofa bed mechanism, opening, closing and being folded up for long periods of time. Our high density foam core (2.5 lb. density) has a high resilience, which will keep it coming back to its original shape for a long time. Our sofa bed mattresses are covered with the types of fabric (mattress ticking) that you would find on other mattresses in your house and are designed to last. We sew all the ticking seams and we never use flimsy zippers that might break or make you feel uncomfortable.
  • Custom Sizes—Sofa bed mechanisms come in a variety of sizes. We make hide a bed mattresses from 24 inches up to a 65 inches wide and in a variety of lengths. There is no added charge for this customization. Pricing is broken down by Twin, Full, Queen and Super Queen. If you don’t see what you’re looking for, give us a call, we’ll try to help.
  • Fast Shipping—Certain full and queen sofa bed mattress sizes (52″x72″, 54″x72″ and 60″x72″) ship within 48 hours. Custom sizes ship within 4-8 business days.
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25 reviews for Platinum Sofa Bed Mattress (4″)

  1. Rated 2 out of 5

    Dewey (verified owner)

    Hard as a rock.

    • ReplacementMattress.com

      Hi Dewey, our promise (given the constraints of a sofa bed mattress being 4″) is that our mattress offers maximum support for the sleeper(s), that the sofa sleeper mattress is durable, stands up to being folded and unfolded many times while being stored in a folded position, that the Platinum sofa bed mattress will not bottom out under 250 lbs per person and the sleeper(s) will not feel the bar. All these aspects affect firmness as well. If you consider the mattress to be too hard, you can have the best of both worlds (support & durability and plush feel) by adding a topper pad after the sofa bed is opened (with the note that the topper would need to be stored separately). Hope this helps.

  2. Rated 5 out of 5

    Anne S. (verified owner)

    We received the mattress and it is very comfortable. Thank you for shipping it so quickly. Very pleased.

    • ReplacementMattress.com

      We’re happy you’re pleased Anne. Hope you and/or your guest will enjoy it for a long time.

  3. Rated 5 out of 5

    Gail Conaway (verified owner)

    My husband and I are very satisfied with the replacement mattress for our 2006 Newmar Motorhome sofa bed. It was easy to order, came to us in no time at all, and fit perfectly. We just took our first trip this Spring and our son and his wife were the first to sleep on it. They said it was great, had no problem sleeping on it at all. Could not feel the springs or the bars on the sofa bed base. We would definitely use replacement-mattress.com again!

    • ReplacementMattress.com

      We’re glad the whole family finds the mattress comfortable, Gail. Happy travels!

  4. Rated 5 out of 5

    John C. Griffin,Jr

    Your replacement mattress simply live’s up it’s billing. My sleeper sofa now feel’s like, well a bed. To the Replacement Mattress staff, a hearty thank you, for your help and consideration.

    • ReplacementMattress.com

      We’re glad we could help John. Thank you for taking the time to leave a review.

  5. Rated 5 out of 5

    george

    I contacted Lou Leibowitz and we talked about the best firm and long lasting mattress was the best. I had a hide abed and decided to change the mattress scheme. These mattresses are the best you’ll find anywhere and are very high quality and constructed with precision…..These platinum mattresses are the
    best …….thanks Lou for all your help. When you buy one of these you will not be disappointed!!!!!!!! 5.0 is to low

  6. Rated 5 out of 5

    Nancy DesJardins

    I was in a difficult place, with an air mattress on a sofa sleeper failure. Thought I would be buying an entire new piece of furniture.. Found Replacement Mattress.com and after a few minutes with Lou, life was good again! great mattress, great service…and I have an RV…so may see you again in the future! Thanks!!!

  7. Rated 4 out of 5

    Eradio Arredondo

    Helpful, so far.
    Easier to order

  8. Rated 5 out of 5

    Michael Mellott

    We have this very old sleeper sofa that is still a beautiful piece of furniture but the coil spring mattress was in very bad shape. It had an odd shape and I didn’t think we’d be able to get a new one. Enter Replacement-mattress.com. Their website is one of the best organized and most informative sites out there. They are able to build a custom sized mattress and get it to you in a very reasonable time. They made our old, beautiful but unusable sofa sleeper whole again. Thanks guys.

  9. Rated 5 out of 5

    John

    I ordered the platinum mattress and it’s very comfortable and firm as advertised. The mattress fit perfectly and Is used as my main bed. This mattress is better than the original sofa bed mattress for comfort.

  10. Rated 5 out of 5

    Donald

    The ‘kids’ (thirty year old daughter and husband, both 6 foot tall) came in from out of town and used the brand new mattress. It got great reviews, they didn’t feel the bar and it didn’t collapse in the middle for the bowl effect!

  11. Rated 5 out of 5

    Jerry K

    I ordered a custom sized Platinum Sofa Bed Mattress. I was
    a bit concerned about delivery as I travel a bit so I called.
    Lou was able to tell me where my mattress was in production
    and when it would ship. It shipped on time and arrived a
    day early. This mattress turned a 40 year old Simmons hide-a-bed into better than new. I’ve tested it several times now as our
    condo is being remodeled, you don’t feel the bars, I’ve
    slept great. The new mattress fits perfect, the sofa bed closes
    just right and now even the sofa is more comfortable to sit on.
    Thank you replacement-mattress! Jerry, La Jolla, CA

  12. Rated 5 out of 5

    diana gossy

    I have a 20+ year old leather sofa/bed that was made of very very high quality materials back when things were incredibly well made for a higher price. The sofa looks almost as good as the day my grandparents got it and I didn’t see any reason to give it up when the mattress finally came to its end. Thanks to REPLACEMENT MATTRESS for a great quality product. Ordering was a breeze and they shipped in a very timely manner!!!

  13. Rated 5 out of 5

    Karen McCarthy

    I am thrilled to be able to tell anyone interested in your replacement mattress products that this was the best decision I made for our sleep sofas. My husband and I purchased a new camp and the previous owner left us a great sleep loveseat and sofa. However, the mattresses we horrible. I researched and came across this website and ordered 2 Platinum mattresses. 1 was a standard queen size and the other a customer size for the loveseat sleeper. Expecting 2 -3 weeks for delivery, I was shocked when they arrived within a week!! And then to find the quality to be so superior to anything I could find in my research was just the icing on the cake. My 6′ 6″ / 200lb. niece’s boyfriend said “I slept like a baby!” We will have these mattresses for many years! Thank you for your great Products & Service and for being Made in the USA!! –

  14. Rated 5 out of 5

    Karen

    We hadn’t realized how awful our old sofa bed mattress had become until some friends showed up with an inflatable bed to use during their visit. After doing some research, we chose to buy a Platinum 4″ mattress from Replacement-Mattress to replace the old one. The measuring instructions were helpful, the ordering process was straightforward, and the mattress arrived promptly and in good condition. The next time our friends visited, they again brought their inflatable bed… but it never left the trunk of their car. I’ll be back the next time I need a replacement.

  15. Rated 4 out of 5

    Jacer

    I needed to replace 2 sofa mattresses.
    I first purchased the Platinum. Way too hard. I plan on having my 250 pounder nephew sleep on it to soften it up!
    I then ordered the Gold which is much better.

  16. Rated 4 out of 5

    Pinky

    The mattress is very nice and true to the size. Yes,I would recommend this mattress.

  17. Rated 4 out of 5

    Pinky

    The mattress is very nice and true to the size. Yes,I would recommend this mattress.

  18. Rated 5 out of 5

    Mabel T Flowers

    The replacement mattress for my sleeping sofa was perfect. My grandchildren said it is very comfortable. It’s good to know that they can have a comfortable sleep when they visit from out of town. The mattress arrived quickly, was packaged well, and was easy to put onto the sofa. It folded into the sofa with no problems.

  19. Rated 5 out of 5

    Lee Keith

    I haven’t bought a mattress yet but I can’t find any reviews for the 4 inch

    • Rated 5 out of 5

      ReplacementMattress.com

      Thank you for turning to us with your question Lee. All the reviews on our Platinum sofa replacement mattress page are related to the 4 inch thick mattress, as we offer this type of hide a bed mattress only in 4 inch (the thickness of our Gold sofa mattress is available in both 4 and 5 inches). Hope this helps. Let us know if you have any other questions.

  20. Rated 5 out of 5

    Selina Cleck Hoffman

    I haven’t received our mattress yet, but just speaking to the gentleman helping me to order was wonderful. It is nice to know that there still is customer service people that really care and I can understand! Thank you for your help and looking forward to receiving our mattress.
    Selina Cleck Hoffman, PA

  21. Rated 5 out of 5

    Viviana Gomez

    We ordered this mattress for our queen sleeper from Haverty’s. The old mattress was horrible as we could feel the springs. This new platinum foam mattress does not look that thick; however, it is comfortable and we are able to fold our queen sleeper easily. I’m glad we found this site and gave it a try. We will definitely keep you information for our next upgrade.

  22. Rated 5 out of 5

    joe cornett

    I want a price please. cant figure out where to get in the web site. Will write a review later, if I buy one.

    • Rated 5 out of 5

      ReplacementMattress.com

      Hi Joe,
      To get the accurate price for your mattress, on the top of the page select the Width and Length of your desired mattress, the price will be updated automatically. After that in order to order, you just have to click on the “Add to Cart”, and follow the next steps. If you experience any problems, please call us at 888.889.2812.

  23. Rated 5 out of 5

    Gary Hageman

    We recently purchased a 2000 class C Jayco motorhome. We have owned several motorhomes and campers over the years. This one had the absolutely worst bed we ever used. This torture device has a heavy steel frame with a supporting web of piano wire under a canvas tarp. The mattress was of the cheapest … etc. We replaced it with the mattress from these folks and their claims are true. You don’t feel the supports. Fit was perfect. We are very pleased!

  24. Rated 5 out of 5

    Charles cole

    mattress fits great. Staff very helpful in getting what we needed to fit an antique hide a bed. Would definitely recommend this company and would use it again.

  25. Rated 5 out of 5

    Jeanne Smith

    Our platinum mattress turned out to be exactly as advertised. It is very firm, very comfortable. I also appreciated the information I received from this company; they spent a great deal of time with me over the phone, answering all my questions thoroughly. Our sleep sofa is an old one, so I wasn’t quite sure if things would work out; they did! Highly recommend.

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