Serta Cromwell Firm Full-size Mattress and Box Spring Set

by Serta
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ITEM# 11927337
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ITEM#: 11927337

Sleep in comfort on this full-size firm mattress set. The set includes a Sertaedic firm mattress and boxspring and also features antimicrobial fibers to help reduce asthma and allergy triggers.

  • Features antimicrobial fibers to help reduce asthma and allergy triggers
  • Includes a Sertapedic firm mattress and box spring
  • Ideal for those who like a firmer feel to their bed
  • Soft, resilient fiber provides a plush surface that breathes away heat and moisture
  • Layers of high density support foams provide enhanced firmness to the sleep set
  • Double-tempered hour-glass steel coil design provides lasting support to the body
  • Heavy-gauge steel border rod provides enhanced edge support and a firm seating edge
  • Mattress set meets all federally mandated flammability standards with Serta's patented FireBlocker system
  • Resistant to dust mites, naturally antimicrobial
  • Temperature-smart memory foam responds to body heat and movement, reshaping to distribute body weight and relieve pressure points to improve circulation
  • Never needs turning

  • Mattress set: 18 inches high x 53 inches wide x 75 inches long
  • Mattress: 9 inches high x 53 inches wide x 75 inches long
  • Foundation: 9 inches high x 53 inches wide x 75 inches long

White glove home deliveries require 4-hour window to complete delivery; this includes delivery of mattress, set-up in the room of your choice, removal of all packaging and debris and removal of old mattress upon request. Please note that there is no surcharge for additional flights of stairs. You will be contacted by the home delivery agent when the product is ready for delivery (typically 1 to 3 weeks), we recommend requesting product removal at the same time you schedule home delivery appointment.

Photo is for illustration purposes only. Fabric color, pattern and quilt stitching may vary.

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


Mattress Type Innerspring
Thickness 9 Inch
Mattress Top Tight Top
Mattress Support Firm
Product Features Antimicrobial
Recommended Foundation Type Box Spring
Useful Link Mattresses and Memory Foam
Dimensions 18x53x75
Warranty 10 year Limited Manufacturer
Model Number 575971-830
Country of Origin United States
  • Most Recent

  • Good deal
    Verified Purchase

    It is comfortable and holding up well after many months for my 4 year old. Would have given 5 stars but it's a little thin for an adult (I'm 180 lbs and bottom out on the board underneath when sitting down on it). Price was right, delivery was quick.

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  • Not firm enough
    Verified Purchase

    This user earned $2.00 in rewards for writing this review.Learn More

    It is described as a firm mattress but I really didn’t find it firm at all. It was a cheap mattress and I got what I paid for. Certainly don’t expect this mattress to last long.

    Read More
  • very nice
    Verified Purchase

    This user earned $2.00 in rewards for writing this review.Learn More

    mattresses were comfortable with the right fitness. delivery was right on time. The workmen setup the new mattresses. they took the old mattresses and all the wrapping.

    Read More
  • It Slept Well
    Verified Purchase

    I had this mattress for about 5 years, it slept well for the money...

    Read More
  • Nice Mattress!
    Verified Purchase

    This user earned $2.00 in rewards for writing this review.Learn More

    Another great offering from! Arrived quickly and without any damage. Photos on represent the item very accurately. Overall, very satisfied with my purchase! Thanks,!

    Read More
  • Most Helpful

    Verified Purchase

    Avoid buying a mattress online unless you have tested it in the store... I read the other reviews and thought I was getting a good firm mattress set. Very flimsy mattress that does not warrant the price tag. Not quite a sleeper sofa mattress but barely a step better in terms of density and overall support even with box spring. Back hurts after sleeping in it. Definitely no good for two people sleeping in same bed. AVOID THIS ONE AND CHOOSE ANOTHER IF YOU LIKE FIRM SUPPORT!!! Unfortunately non-returnable if not defective.

    Read More
  • Works fine
    Verified Purchase

    This is a fairly firm mattress. We wanted one without a pillowtop, and this fit the bill. Well, we wanted a flippable one, but they're about as common as dodo birds these days. The firmness is perfect for my significant other, but a little too firm for me. I've had it about 2.5 months and I think I see some symptoms of sagging already, but only when I really hunt for it, sitting on the floor beside the bed, to check before writing my review.

    Read More
  • one sided
    Verified Purchase

    I'm happy with the purchase, but was surprised that the mattress cannot be flipped. I mean there is the top which is normal, but the other side of the mattress is like a boxspring. It is firm, my husband says too firm, but my daughter has not complained.

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  • Great Mattress and Service
    Verified Purchase

    We had such a great experience with this mattress! It is really comfortable and a really good deal but the incredible customer service was even better. They called several times to alert us on the upadates with our mattress shipment and to schedule the delivery. We even missed the first scheduled delivery which was totally our fault and they were very gracious and rescheduled with no problem. They even took our old mattress away which was really helpful. Overall this was a great purchase and for $2 you can't beat having it delivered! (I paid $69 to have another mattress deliverd from a store 10 minutes from my house!) I'll definitely shop with overstock again.

    Read More
  • Cheaply Made. A Big Disappointment
    Verified Purchase

    The descriptions and photo made this mattress look like a high end super comfy think mattress. What arrived was a cheap, bad satin slippery flimsy thin thing that is so lightweight it won't stay in place on the box spring. It smelled of "bad factory" chemicals. I aired it out for a day before putting sheets on it. It was for my 12 year old daughter, and she's not picky. But she couldn't sleep on it; I could tell she was disappointed. It's the kind of mattress you see for sale for $99 at a Goodwill. I adore Overstock, and the bed I bought was just perfect. I have had great luck with buying furniture and would do it again. But this is a real stinker of a product. Can't believe it's the same mattress that other reviewers described here.

    Read More

Questions & Answers

  • Q:

    "can you put any mattress on an adjustable box spring"

    • A:

      Thank you for your interest. No, the current Sertapedic and Perfect Sleeper models are not adjustable base friendly.Please feel free to contact us again with any further questions.

  • Q:

    "how do i use my warranty?"

    • A:

      For a manufacturer warranty, you may contact the manufacturer with your order information. To use the 10-year extended warranty, you may contact Guardsman''s Warranty Department at 1-800-253-3957 with your warranty contract number.

  • Q:

    "are the box springs included in the warranty?"

    • A:

      Yes, the full item is included in the warranty.

  • Q:

    "What is the coil guage?"

    • A:

      The gauge is 13 3/4.

  • Q:

    "what is the coil count"

    • A:

      This item has a 396 coil count.

  • Q:

    "does manufacture warranty the mattress?"

    • A:

      This item comes with a 5-year non-prorated manufacturer warranty.

  • Q:

    "Can the mattress double sided?"

    • A:

      No according to other reviewers it is not.

Shopping Tips & Inspiration

Shipping & Returns

Contact Information
1-4 week delivery after the item ships:**

Delivered by freight carrier. See Oversized Item Delivery Policy.

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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This item cannot be shipped to Alaska or Hawaii. More details

Oversized Item Delivery Policy:

This item will be shipped via freight carrier to your home, excluding rural routes, remote areas not in close proximity to areas commonly serviced by freight carriers, islands, APO/FPO addresses, P.O. Boxes, Alaska and Hawaii. Please provide your daytime and evening phone numbers during check out so our carrier can contact you to schedule delivery. Refer to our Oversized Item Delivery Policy for additional information.
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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.