"I as well have a split frame box spring I do not like low beds, How do I keep the height? with the system I have and avoid the lump in the middle. Is there a kit for this or does a piece of 3/4 plywood fix the issue? ."
ITEM#: 13661861This 12-inch reversible California king foam mattress provides superior comfort for a good night's rest. This reversible mattress is constructed of a plush foam on top of high density foam covered in stretch knit ticking on each side.
- Construction: Foam
- Support: Medium
- Materials: 1.75-inch plush foam on each side of an 8-inch layer of high density foam
- Keeps true form and will not compress
- Lightweight and easy to turn
- Disperses your weight evenly and provides the ultimate in pressure-relieving comfort
- Made from 100-percent hypoallergenic materials that make this mattress ideal for those who suffer from allergies
- Mattress can be used with an existing frame
- Great for platform beds or slatted frames
- Meets all flammability standards
- Mattress: 84 inches high x 72 inches wide x 12 inches deep
- 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.
The firmness level of every item is unique. Please be advised that even similar products may produce different firmness results.
' border='0' align='left'>
Once opened this product is non-returnable.
Click here to view more sizes.
|Memory Foam Type||Foam|
|Mattress Top||Plush Top|
|Product Features||Bed in a Box|
|Recommended Foundation Type||Bed Slats, Box Spring, Platform|
|Country of Origin||United States|
Quality RatingLearn More
Features for RugsSee All Features
Reversible Pillow Top 12-inch King-size Memory Foam Mattress
Select Luxury Medium Firm 7-inch King-size Memory Foam Mattress
Select Luxury Medium Firm 9-inch King-size Memory Foam Mattress
Select Luxury Flippable 12-inch Twin-size Foam Mattress
Select Luxury Medium-firm Quilted Top 10-inch King-size Foam Mattress
Select Luxury Medium-firm Quilted Top 8-inch King-size Foam Mattress
Select Luxury Gel Memory Foam 10-inch King-size Medium Firm Mattress
Good for about 6 months Then started to sag in the middle. But it was very comfortable when first purchase so for the price not a bad value but not a long term mattress.Read More
I bought this because I purchased a queen size last summer and I thought it was too hard but after a week I noticed my back, side and any pains I had from sleeping where GONE! When I moved back home my pains came back. I thought I was getting sick. We had an expensive cushion top Cal King mattress on our bed. I decided to order a Cal King foam mattress from overstock all though not as hard as the queen again all my back, side and neck pain GONE. Why buy a $2,000 mattress when you can get this for a 1/4 the cost and have a great night sleep! Comes in a box rolled up. Opened the box in bed room and pulled mattress onto box springs wal-la the mattress comes to life in a matter of a few hours and is fully expanded in a day or so.No smell, no fuss and no pain! I would of liked it harder like the queen was, but perfectly happy!Read More
Shopped at retail outlets for new mattress. Liked Foam Mattress, however did not like the price. Decided to look on O.co to compare prices. Decided to try this one for one third of the price of retail. My husband and I love it. My husband was starting to have lower back pain in the morning from our old spring mattress and now he says he wakes up refreshed without pain.Read More
Really enjoying this mattress. My husband would have preferred it being softer. The only complaint is the cover over the foam has moved so the seam is a bit off.Read More
Could not believe small box opened up into a complete Cal King mattress! easy and comfortable.Read More
Questions & Answers
a professional contractor or a bed store expert may be the best person to consult
"Can I place this mattress on top of a split frame box spring or will that cause a lump in middle of mattress? (Our box spring is currently 2 separate frames next to each other. Thanks for any info you have. Tracy"
No, you cannot; it will cause a lump in the middle of the mattress.
Shopping Tips & Inspiration
3 Ways to Extend the Life of Your Mattress
On average, the life of a mattress lasts seven to ten years if it's properly cared for, so I'm taking measures to keep my mattress in great condition. Whether you just bought your mattress or your current one needs some extra love, here are my top three tips for extending the life of your mattress.
Living Room Ideas
Get inspired by the hottest trends in living room furniture and decor. Shop our huge selection of living room furniture and decor at Overstock.com.
How to Choose Mattresses for Children
The right mattress is essential to a good night’s rest, and this is especially true for young children. Because high-quality mattresses last up to 10 years or longer, it’s important to find one that grows with your child and can accommodate developing bodies.
Best Bedding for Christmas
Update your home and keep everyone on your shopping list warm and bundled up this Christmas with our best bedding gift ideas. Shop our huge selection of bedding at Overstock.com.
Tips on Buying a Memory Foam Mattress
Get familiar with the details of memory foam so you can be an expert when you buy a new mattress.
Coastal Furniture and Decor Ideas
Find Coastal decorating ideas for your home. Shop our huge selection of Coastal furniture and decor at Overstock.com.
Boho Chic Furniture and Decor Ideas
Find Boho Chic decorating ideas for your home. Shop our huge selection of Boho Chic furniture and decor at Overstock.com.
Industrial Furniture and Decor Ideas
Find industrial decorating ideas for your home. Shop our huge selection of industrial furniture and decor at Overstock.com.
Shabby Chic Furniture and Decor Ideas
Find shabby chic decorating ideas for your home. Shop our huge selection of shabby chic furniture and decor at Overstock.com.
How to Buy a Mattress
How to Buy a Mattress from Overstock.com. With a good mattress, you'll wake up rested and feel better throughout the day. Here's what you need to know about choosing the best mattress.
Spirit of the Southwest
Capture the enchanting aura cast by red rock and turquise stone in home furnishings and decorative accessories inspired by the American Southwest.
Mixed Material Home
Reclaimed Wood and Cement. Marble and Metal. Leather and Wood. These materials didn’t used to be mixed but now they've come together for a winning combination.
Shipping & Returns
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.
This item cannot be shipped to Alaska or Hawaii. 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.