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InnerSpace High Density 6-inch Twin-size Foam Mattress

Overall Rating Rating 4.5  |  179 reviews  |  Write a review
Today $159.99
Item #: 14009790
    Say goodbye to sleepless nights with this comfortable high-density foam mattress. Made with a thick foam core covered in a stretchy cotton, the mattress is designed to support your body evenly, reducing the pressure that leads to sore muscles....more

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Sponsored Links What's This?
    This resilient, high-density polyurethane foam core mattress distributes body weight evenly and eliminates uncomfortable pressure points. This mattress comes with a quilted cotton stretch knit cover.

    • Mattress measures 6 inches thick
    • Materials: High-density poly foam
    • Cover is quilted cotton stretch knit
    • Dimensions: 6 inches high x 38 inches wide x 75 inches long
    • Designed to fit all standard size twin beds with or without a box spring
    • Plush quilting on top and bottom
    • Spot clean mattress as needed
    • Mattress can be flipped if desired


    • Foam Tips:
    • Remove from packaging within 72 hours of receipt to maximize expansion.
    • This product arrives very tightly packed. Unwrap and allow 48 hours for this product to return to its original shape.
    • Being sealed in plastic packaging sometimes traps odors. After unwrapping, allow product to air for a few hours.
    • Due to machine-cutting manufacturing processes, there may be slight variances in the dimensions of this product.

    Firmness level of every item is unique. Please be advised that even similar products may produce different firmness results.

    Once opened this product is non-returnable.




Dimensions:
See description
Warranty:
10 year Manufacturer
Materials:
See description
Model No:
OSK-SLT-3875
Brand: Innerspace

Features

  • Mattress Type
    Foam
  • Thickness
    6 Inch
  • Memory Foam Type
    Foam
  • Support
    Medium
  • Mattress Top
    Specialty
  • Product Features
    Made in USA
  • Recommended Foundation Type
    Bed Slats, Box Spring, Platform
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Showing 5 most helpful reviews on this product.

  • 5 Stars 125
  • 4 Stars 38
  • 3 Stars 8
  • 2 Stars 5
  • 1 Stars 3
  • Best purchase in a long time

    This is wonderful, we bought this for my dad becaue he has joint and back problems. The first night he slept on it he slept 9 hours straight through !!! this hasn't happened in years. So glad we bought it and at this price it is a steal !!!

    • How did the color on site compare with the actual product? same
    • Please tell us about the quality of the product. excellent
    • How accurate was the on site description of the product? exactly as described, no variatioon at all
    • Would you recommend this to a friend? Yes
  • Great mattress

    This is a great mattress for the price. The only problem I had was being able to tell which side had the wool-blend for winter and which one had the cotton-blend for summer. It would be nice if there was a tag on it to distinguish which side was which. Otherwise, very satisfied!

    • How did the color on site compare with the actual product? Fine
    • Please tell us about the quality of the product. great
    • How accurate was the on site description of the product? great.
    • Would you recommend this to a friend? Yes
  • Buyer Beware!

    This bed is advertized as a 6" high density foam mattress but is only 4" thick with a nice padded cover that might add another 1/2 to 3/4". The foam itself is nice, but I need 6". I bought the twin size for my small travel trailer bed. After receipt of the first mattress, which expanded as advertised, I contacted Overstock, whose rep was very easy to work with. The first mattress was donated to a local women's shelter and they sent me another. It expanded to the same thickness, 4" from side seam to side seam. They offered me a 20% refund to keep the 4" one which I did. I have a 3" memory foam pad to put on top. Not ideal as the memory foam is softer than I like but will work in my trailer bed for now. As others have said, this mattress is OK for kids and bunk beds, but not really enough for a full size adult. Kudo's to Overstock for working to make it right.

    • Please tell us about the quality of the product. OK but not as advertized
    • How accurate was the on site description of the product? Not.
    • Would you recommend this to a friend? No
  • Comfortable

    Pleasantly surprised as far as the comfort of this mattress. Neither too hard nor too soft. But, contrary to the description, it did not expand to 6", thought. Barely 5". After letting it expand for several days now, I don't think it'll get any thicker, which is misleading. I had found this mattress at another site where they had several options, 4", 5" and 6", and in comparing prices, I figured the 6" model sold by overstock was the same price as the 5" (including shipping) from that other site. I wanted to make sure it was thick enough so that I would not feel the metal base underneath it. I don't, s o I am ok with that but I feel that Overstock should adjust its description. I would probably buy again this same product!

    • How did the color on site compare with the actual product? hard to tell
    • Please tell us about the quality of the product. seems fine
    • How accurate was the on site description of the product? accurate except for the thickness. 5", not 6.
    • Would you recommend this to a friend? Yes
  • Foam is the only way to go!

    This is our second time buying Innerspace mattresses. The twin is a little softer than I expected but plenty of support for my son. My husband and I sleep on a queen that is 8 years old and starting to get a little soft. We have converted 2 family members and 2 friends to Innerspace mattresses after sleeping on our bed. The comfort and price cannot be beat!

    • How did the color on site compare with the actual product? Similar, the twin sized mattresses I ordered have brown piping around the edges.
    • Please tell us about the quality of the product. Great mattresses
    • How accurate was the on site description of the product? Very accurate
    • Would you recommend this to a friend? Yes
View All Most Helpful Reviews
  • Amazing Mattress

    I got this mattress for a twin platform bed for my daughter's senior year of college. Her apartment had a tiny bedroom so she didn't want anything big. She loved the mattress, and I even slept on it one night as well. She wants one now for her guest room in her new house. Highly recommended.

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    • Would you recommend this to a friend? Yes
    Flag

    srhayes from Denton, TX, Aug 27, 2014

  • Innerspace High Density Foam Mattress

    I ordered this mattress over a year ago and is still as great as when I first got it . I ordered another one a few weeks ago, this time for my daughter. Again, a good solid, firmer foam mattress. So comfortable and certainly worth every penny but not sure if this has any kind of memory foam .

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    • Would you recommend this to a friend? Yes
    Flag

    marlo102 from Plainfield, IL., Aug 10, 2014

  • Mattress

    Ordered monday am~ rec'd friday am~NO shipping charge!! impressed!

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    • Would you recommend this to a friend? Yes
    Flag

    surprised45 from Ct, Jul 9, 2014

  • Great mattresses

    We have two of these for our boys bunk beds and they work great. Not too hard, not too soft. Definitely pleased with them.

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    • Would you recommend this to a friend? Yes
    Flag

    amccauley7983 from Chicago, IL, Jun 24, 2014

  • Good mattress for the money!

    My husband is sleeping on this mattress and has no complaints. I thought it wouldn't be thick enough when it first arrived, but it's amazing now that it's plumped up, how it supports weight. He's not a big guy, tall but only about 160 lbs. It is supporting his weight nicely with no complaints. Cannot feel the metal frame underneath at all. Cats approve of it, too!

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    • Would you recommend this to a friend? Yes
    Flag

    terryleet from Modesto, CA, May 20, 2014

View All Most Recent Reviews

Product Q&A

Ask a Question

What does the 10 year warranty cover, and where is the warranty specified? skuffy on May 26, 2014
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Answer This Question

Hello skuffy, thank you for your inquiry. Unfortunately, the information you have requested is currently unavailable. We will continue to try and answer this for you. You will receive an email notification once an answer is posted. Have a great day. overstockcustomercare1 on Jun 12, 2014
 
 

Is this mattress CertiPUR-US certified? jg36 on May 24, 2014
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Answer This Question

Hello jg36, this mattress is not CertiPUR certified.Thank you for shopping with us. overstockcustomercare1 on Jun 6, 2014
 
 

Would this mattress work for bunk beds? cherice0416 on Apr 27, 2014
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Yes that is exactly what we use it for. It is great and fits perfectly . Very comfortable ( a little soft for me) perfect for the kids : ) gb1009 on Apr 28, 2014
 
Yes, these are great for bunk beds. It also makes it easy to make the top bunk bed because they are light enough to lift up and tuck sheets in. amumsbouquet on Jun 22, 2014
 
 

What is the color? It looks beige but I'm guessing its white? brittnjule on Jul 17, 2013
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Answer This Question

Hello brittnjule, This looks beige or off white when looking at the pillows. Thank you for shopping Overstock.com. Have a great day! overstockcustomercare1 on Jul 23, 2013
 
is light beige jc0123 on Sep 9, 2013
 
It's a cream and beige brocade pattern. Very classy looking in the neutral tones. zrkocsis on Dec 17, 2013
 
Mine arrived yesterday. It is beige, not white, and its slip cover has a more "traditional" quilted mattress look to it than some other foam mattresses I have seen. It looks pretty nice. ejws1 on Apr 29, 2014
 
 

how does it come packaged? nicolemaria on Apr 11, 2013
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like size wise how big? nicolemaria on Apr 11, 2013
 
Hello nicolemaria, The InnerSpace High Density 6-inch Twin-size Foam Mattress arrives compressed, and very tightly packed. we recommend allowing the mattress to expand for 48 hours after opening. The dimensions of the shipping box are 41 inches high x 13 inches wide x 12 inches deep. Thank you for shopping with us. overstockcustomercare1 on Apr 17, 2013
 
 

what kind of chemicals has this mattress been treated with? hdmommy on Apr 4, 2013
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Answer This Question

Thank you for shopping with us hdmommy. The mattress is made from soy and the cover is cotton. I hope that helps. overstockcustomercare1 on Apr 9, 2013
 
 

If the mattress is not taken out of the wrapping, can it be returned if it feels too firm? If so, do I pay the shipping charges back or would I get a return label? Thanks. kmb549 on Apr 1, 2013
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Answer This Question

Thank you for your interest in the InnerSpace High Density 6-inch Twin-size Foam Mattress. If the mattress received is damaged, the wrong size or any other defect then we will pay for it to be returned, but, if you receive it and you just don't like the firmness or the color or anything else then it is considered buyers remorse and even if it is unwrapped or unused you will still pay for the return shipping charges. If it is unwrapped or used then you may be able to return it, it would just have to be inspected by the warehouse for problems and then they would decide how much to give you back. It can be anywhere from 10% to 100% depending on the condition and circumstances. We hope this helps out. Have a great day. overstockcustomercare1 on Apr 4, 2013
 
 

Is the foam latex rubber or polyurethane foam? onbutnotof on Mar 17, 2013
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Answer This Question

Uncover the secret to continuous comfort. Our sleep luxury mattress is 6-Inch of durable, high-density polyurethane foam that conforms to your body and doesn't lose its shape. Additionally, when your spouse gets into bed, you won't roll off or bounce around, because the mattress has independent support and contains no springs. The plushly quilted, stretch knit cover add extra softness and durability. Thank you for your question. Please feel free to contact us again with any further questions. overstockcustomercare1 on Mar 20, 2013
 
 

Can this item be used with the durabed steel twin size platform with out a box spring? Also is it the right fit? mfiamiriam on Jan 28, 2013
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Yes. My son's bed is a platform bed with slats underneath the mattress and you do not feel the slats and the mattress does not appear to sink into the slats. phxchica on Jan 29, 2013
 
 

How is this mattress treated for meeting fire safety regulations? What chemicals are used? I saw a review mentioned cotton and wool, are these materials in the mattress? travelingmercy on Jan 16, 2013
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Answer This Question

The cover is a quilted cotton stretch knit cover and we use a fiber barrier under the ticking to obtain flame resistant properties. The fiber barrier is primarily Rayon, and there shouldn’t be any chemicals in the fiber. It is embedded with silica to achieve its flame resistant properties. Thank you for your question. overstockcustomercare1 on Jan 23, 2013
 
 

Hi, would this mattress be safe for my 2yr old son who is moving to a bunk bed? Is it too soft? xperiaarc12 on Jan 11, 2013
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Answer This Question

Being sealed in plastic packaging sometimes traps odors. After unwrapping, allow product to air for a few hours. This unit is not made of anything that can hurt or be harmful to the child. The question about being too soft really depends on the person the and their preference. overstockcustomercare1 on Jan 11, 2013
 
 

How long does it take for the mattress to fully decompress? I opened this to air out 3 days ago and it is still only 5" summy23 on Nov 4, 2012
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Answer This Question

It really should have fully expanded by now. Usually 72 hours is about what it takes to do that, but I would give it another day or so, since you are so close to that 72-hour mark. If it does not finish expanding after 4 days, it may be defective, and you will need to contact Customer Service at 1 800 843 2446 to make arrangements for a replacement. overstockcustomercare1 on Nov 5, 2012
 
It needs to air out for 48 hours. overstockcustomercare1 on Nov 7, 2012
 
 

Can you please find out what is the density in Ibs for this mattress? Thank you. graceooi on Sep 10, 2012
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Answer This Question

The density is 1.8 pounds. overstockcustomercare1 on Sep 11, 2012
 
 

What is the weight of this mattress? nsrrlady on Sep 1, 2012
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Answer This Question

The shipping weight is 20 pounds, which is very close to the actual weight. overstockcustomercare1 on Sep 4, 2012
 
 

Will this work as a sofa sleeper mattress? jane886 on Aug 22, 2012
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This item is not recommended for a sleeper sofa. overstockcustomercare1 on Aug 23, 2012
 
 

What is the recommended weight for this product customm on Jul 5, 2012
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Unfortunately, this mattress does not have a listed weight limit. overstockcustomercare1 on Jul 11, 2012
 
 

What is the exact density? 3lb? 4lb? 5.3lb? twooclockjoe on Jun 26, 2012
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Answer This Question

The density is 1.8 pounds. overstockcustomercare1 on Jun 28, 2012
 
 

how firm this mattress is? smorodinkaja on May 12, 2012
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Answer This Question

Out of the 24 reviews on our site 2 people report it as being firm and many others state how comfortable it is. Another site that had less reviews but sold the same product reported this as firm but again comfortable. More of the other site reviewers used firm in their description. overstockcustomercare1 on May 15, 2012
 
 

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Usually leaves our warehouse in 1 business day. *

Mattress Return Policy:

Mattress Sets are non-returnable upon signature at delivery. Mattresses are non-returnable if opened or taken out of their plastic wrapping.
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Shipping Information:

Our standard shipping method is ground shipping. We also offer expedited shipping for most items. Your final shipping cost and estimated delivery timeframe will be available at checkout.
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** Most Oversize orders are delivered within 1-4 weeks. Some orders may take 6 weeks to be delivered.

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