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Innerspace 4.5-inch Queen Wide Memory Foam Sofa Sleeper Mattress

by Innerspace
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ITEM# 15056342
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ITEM#: 15056342

This memory foam mattress evenly distributes body weight to eliminate uncomfortable pressure points. A quilted cotton stretch knit cover protects this soft mattress.

  • Mattress measures 4.5 inches thick
  • Materials: Visco elastic memory foam
  • Cover: Quilted cotton stretch knit
  • Mattress measures 64 inches wide x 72 inches long x 4.5 inches thick
  • Open cellular structure channels heat away from your body to keep you cool and comfortable
  • Improves circulation while reducing pressure points that can disrupt your sleep
  • Mattress eliminates motion transfer
  • Never needs turning or flipping
  • Disperses weight evenly
  • Mattress can be used with an existing frame
  • Meets all flammability standards
  • Durable non-quilt damask
  • Spot Clean as needed, Cover can be zipped off for dry cleaning
  • 4.5-inches of total thickness with 1.5-inches of Visco memory foam

Memory Foam Tips:
  • To maximize memory foam expansion; remove from packaging within 72 hours of receipt.
  • This product arrives very tightly packed. Please unwrap and allow 48 hours for this product to return to its original shape.
  • Being sealed in plastic packaging sometimes traps odors. A few hours of airing usually removes the odor.
  • Due to machine cutting manufacturing processes, there may be slight variances in the dimensions of this product.

Due to the nature of Memory Foam the firmness level of every item is unique. Please be advised that even similar products may produce different firmness results

Please note: This is the mattress only. Sofa is not included.

30-Day Comfort Guarantee - If you are not satisfied with your purchase within 30 days, you may return your order for a refund. After 30 days, the mattress cannot be returned.


Mattress Type Folding, Memory Foam, Sofa Beds
Thickness 4.5 Inch
Memory Foam Type Foam, Memory Foam
Support Medium
Mattress Top Tight Top
Product Features Bed in a Box, Hypoallergenic, No Tools Assembly
Recommended Foundation Type Adjustable, Platform
Dimensions See Details
Warranty 5 year Manufacturer
Model Number OSK-SM6472
Country of Origin United States

Product Reviews

5 Stars
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1 Stars
  • Most Recent

  • Good Quality Mattress - would recommend.
    Verified Purchase

    I am quite happy with this mattress. Unfortunately, since I needed a Queen WIDE mattress, I had only ONE option, so I had no choice but to purchase this one. I am happy with it, but not completely thrilled. I think it was a *bit* overpriced, considering the Queen REGULAR mattress of the exact same thickness and brand was $!@# less... seems a bit too much to pay for 6 extra inches, but I didn't have much of a choice! Overall, the mattress is pretty great quality. It is very plush, beautiful memory foam, and there was no strange smell at all, which you sometimes get with memory foam. It is a definite improvement in comfort from the spring mattress that I had replaced, but you *can* still feel the bar in the middle of the frame. BUT - overall, I am quite happy. The shipping time was excellent - it arrived in 2 days!!

    Read More
  • very comfortable
    Verified Purchase

    This mattress makes sleeping on a sofa bed great! I used it on top of the "regular" (but inadequate) mattress that comes with the sofa bed and together the thickness is the same as most bed mattresses. I could use a fitted queen-sized bed sheet on it and it fits perfectly. It expanded to the size described when taken out of the plastic wrapping, but is a challenge to store when it's not on the sofa bed. It seemed a bit warm to sleep on but not intolerable.

    Read More
  • Verified Purchase

    Read More

Questions & Answers

  • Q:

    "Why did you choose this product?"

    • A:

      I have a 40 year old sofa-bed and the sofa is still in great shape and very comfortable, but the mattress had never been comfortable--but, especially now, after 40 years. Unfortunately, the mattress size is 65x72 and it has been very difficult to find a replacement. After inquiring online to Overstock, I was advised that you had this one which is 64x72. Decided to give it a try. Felt it was pretty expensive considering a few inches smaller was so much cheaper, but decided to get it after receiving your 12% off coupon and will hope for the best.

  • Q:

    "I would also like to know the density of this mattress. It seems to be one of the few 64" wide that I have found."

    • A:

      Thank you for your interest in this item. The true dimensions are 72 inches long x 64 inches wide. The weight is 25 pounds and 4.5-inches of total thickness with 1.5-inches of Visco memory foam. It also has a knit cover for protection and the density is unknown. This item comes with a 5-year manufacturers warranty.

  • Q:

    "Are the true dimensions 72 x 64? Also provide some more detail on the density of the core or the weight of the memory foam. And can you provide warranty details? Thank you."

    Have an Answer? Be the first to answer this question!

Shopping Tips & Inspiration

Shipping & Returns

Contact Information
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.
Standard shipping details
Expedited shipping details

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.
More Details

For your protection, all orders are screened for security purposes. If your order is selected for review, our Loss Prevention Team may contact you by phone or email. There may be a two business day delay to process your order.

** Most Oversize orders are delivered within 1-4 weeks. Some orders may take 6 weeks to be delivered.