Serta Cromwell Firm Twin-size Mattress and Box Spring Set

by Serta
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ITEM# 11927336
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ITEM#: 11927336

Sleep in comfort on this twin-size firm mattress set. The bedroom furniture features antimicrobial fibers to help reduce asthma and allergy triggers.

  • Set includes: Sertapedic firm mattress, box spring
  • Antimicrobial fibers help reduce asthma and allergy triggers
  • Ideal for those who like a firmer feel to the bed
  • Soft, resilient fiber provides a plush surface that breathes away heat and moisture
  • Layers of high density support foams provide enhanced firmness
  • Double-tempered hour-glass steel coil design that provides lasting support to the body
  • Serta's 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 38 inches wide x 75 inches long
  • Mattress: 9 inches high x 38 inches wide x 75 inches long
  • Foundation: 9 inches high x 38 inches wide x 75 inches long

White glove home deliveries require a 4-hour window to complete delivery; this includes delivery of the mattress, set-up in the room of your choice, removal of all packaging and debris and removal of your 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 your 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 18x38x75
Warranty 10 year Limited Manufacturer
Model Number 575971-810
Country of Origin United States

Customer Reviews

5 Stars
4 Stars
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1 Stars
  • Most Recent

  • Sweet dreams from now on!
    Verified Purchase

    Bought this set when I moved to new digs. Have been sleeping like a log ever since. No complaints, a bargain for the money. Set-up and delivery were perfect.

    Read More
    katerina1930 Dec 3, 2015
  • Serra twin mattresses
    Verified Purchase

    Love the delivery and unpacking but quality of mattresses only fair. I would recommend personally shopping

    Read More
    mrawles1 Feb 23, 2013
  • comfortable mattress
    Verified Purchase

    I get this mattress for my daughter,before she had memory and its suck,she can sleep now comfortably,nice mattress,firm,its what she wanted,i would buy it again

    Read More
    rasa70 Nov 2, 2012
  • Great mattress
    Verified Purchase

    Good mattress. Bought it for my son and it works for him. Grandpa slept on it once too and he said it felt great for a twin. Great price too with the Labor Day sale!

    Read More
    snshn2411 Oct 23, 2012
  • This Mattress is great for the price
    Verified Purchase

    This is a wonderful mattress for yourself or in a childs room. I have needed a mattress for a while now and decided to just order online. I was a little apprehensive at first because they say you should lay on a mattress before you buy it but then thought anything would be better than the one I had . Was more than satisfied when I recieved the product. It is great! I now get a good nights rest. Just to notify you that it does have a strong odor when you take it out of the plastic. It should be aired out a few hours before you use it. Other than that it is wonderful and I would recommend it to anyone . Great service too!

    Read More
    jjm37 Jun 30, 2012
  • Most Helpful

  • Mattress with no bottom
    Verified Purchase

    I am very disappointed with this mattress. It has no bottom padding which means the mattress cannot be turned. Also it is supposed to be firm but it is bouncy and soft. I wouldn't buy another mattress from Overstock.

    Read More
    grandmamao Feb 20, 2010
  • Excellent Product, Excellent Service
    Verified Purchase

    The mattress set is terrific -- firm but not hard. The delivery team were especially helpful, too. They were polite, well-mannered and carried both mattresses up a slippery hillside since the back road was closed due to flooding for no extra charge.

    Read More
    cjpierce Feb 4, 2010
  • Very good for the price
    Verified Purchase

    Not as firm as I would want, but it very good value for money. I bought the twin size.

    Read More
    tdrhq Aug 20, 2011
  • sturdy but comfortable
    Verified Purchase

    very comfortable and firm . excellent for the back

    Read More
    deeveegaerlan Aug 12, 2011
  • Nice, Firm, but comfy
    Verified Purchase

    It's pretty springy, but seems like it will provide good, solid, comfy sleep in our guest room. It's definately high with the large box underneath. I got it for a day bed that technically didn't need a box, but I felt it would be just that much more supported when my mom comes to stay (who needs a strong, supportive bed). It ended up being too high for the daybed. Fortunately I moved the box to the trundle for storage. Shipping/Delivery was fast, easy, and great. Love me some Overstock!

    Read More
    erinleigh79 Oct 20, 2010

Questions & Answers

  • Q:

    "Is it possible to purchase this mattress without the box spring to use with one of yours daybeds?"

    • A:

      Items are restocked as they become available, however we cannot guarantee an Item will be restocked

  • Q:


    • A:

      No, the mattress cannot be flipped.

  • Q:

    "Is there a suggested weight limit on this mattress. Is it build more for a child or will it withstand an adult somewhere around 200 lbs. I don't know if most twin size mattresses are built for large adults>"

    • A:

      The weight limit for this item is 225 pounds.

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.
More Details


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.
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.