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FDW

FDW 12 inch Gel Memory Foam Mattress Medium Firm Mattresses for Cool Sleep Relieving Pressure Relief CertiPUR-US Certified Mattress in a Box,California King

  • Based on 4,031 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, Aug 11
Order within 2 hours and 9 minutes
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Color: White


Size: California King


Style: 12 IN


Features

  • -Mattress in a box & fits all bed frames- Such fun to receive a mattress thats rolled and compressed in a box . Follow the instructions and see how the magic happens. It is easy to set up and fits all kinds of queen bed frames, even on the floor. Mattress is recommended 72 hours for air out and reshape.
  • -High quality materials-our memory foam mattress, combined with professional knowledge and the best materials, helps to provide advanced sleep technology. Gel memory foam provides continuous airflow to ensure cool sleep at night.
  • -Easy setup - just move the box to the room you want to use, open the box, open the mattress, and watch it expand in front of your eyes. The mattress will be ready in 72 hours!
  • -Perfect support in any position - whether you're a side sleeper, a back sleeper, a stomach sleeper, or just tossing and turning, our mattresses provide the best hardness, coolness and comfort.
  • -Easy to clean-It includes a soft cover that is washable for your convenience. Pressure relieving gel foam naturally draws heat away from the body for a more comfortable night's sleep;Beautifully detailed all around cover with four-way stretch works with the memory foam to optimize its conforming properties.

Description

What is the formula for our best-selling mattress? Precisely layered CertiPUR American certified foam can let you fit into this mattress properly. Our mattress is a perfect combination of soft memory foam and ultra dense base foam, which can provide a sense of support when shaping your body, supporting your most developed joints and aligning your spine. In addition, this mattress uses our high-quality high-density bottom foam to prevent any uncomfortable sinking, sagging or turning over in bed, so as to ensure that you can get the ideal support level and get a peaceful sleep.

Brand: FDW


Size: California King


Product Dimensions: 84"L x 72"W x 12"Th


Item Weight: 82 Pounds


Item Firmness Description: Medium Firm


Top Style: Gel Top


Cover Material: Polyester


Number of Layers: 2


Fill Material: Gel Memory Foam


Special Feature: Removable Cover


Item Firmness Description: Medium Firm


Number of Layers: 2


Additional Features: Removable Cover


Construction Type: Memory Foam


Is Customizable?: No


Size: California King


Item Dimensions L x W x Thickness: 84"L x 72"W x 12"Th


Item Weight: 82 Pounds


Item Thickness: 12 Inches


Item Dimensions: 84 x 72 x 12 inches


Item Depth: 12 inches


Cover Material: Polyester


Fill Material: Gel Memory Foam


Product Care Instructions: Hand Wash Only


Mattress Comfort Layer Material: Gel Memory Foam


Material Type: Memory Foam


Brand Name: FDW


Model Name: Medium Firm Mattresses for Cool Sleep Relieving Pressure Relief


Product Benefits: Fiberglass Free/CertiPUR-US Certified/Bed-in-a-Box/Cool Sleep & Comfy Support


Model Number: 12 inch Gel Memory Foam Mattress


UPC: 195030088439


Manufacturer: FDW


Manufacturer Part Number: MEM-12CK-GQ2-White


Is Extendable: No


Unit Count: 1.0 Count


Included Components: 1 Mattress


Age Range Description: all


Item Type Name: CertiPUR-US Certified Mattress in a Box,California King


top-style: Gel Top


Color: White


Style Name: 12 IN


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Aug 11

Yes, absolutely! You may return this product for a full refund within 90 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Great twin mattress (you'll like it better than yours)
Color: White Size: Twin Style: 12 IN
This is the third time I've bought this mattress and though it's changed a small bit (the cover is slightly different) it is a solid good sized, comfortable twin mattress. It really does expand to be close to 12 inches and is more comfortable than my more expensive memory foam mattress. It's great for kids, guest room, (I use it as my living room daybed/couch. It's well worth the cost and is truly medium firm. I love this better than my mlily mattress. Inflates in hours or so. ... show more
Reviewed in the United States on June 15, 2026 by Rachel
    • Finally sleeping pain-free
Color: White Size: Full Style: 12 IN
I purchased this mattress about a month ago, and it has been one of the best investments for my sleep and overall comfort. Before buying it, I would often wake up in the middle of the night with sciatic pain that made it hard to get comfortable and fall back asleep. Since sleeping on this mattress, I’ve noticed a huge difference. It provides the perfect balance of support and comfort, and I’m finally able to sleep through the night without waking up in pain. I highly recommend this mattress to anyone dealing with back or sciatic pain. ... show more
Reviewed in the United States on May 16, 2026 by Amazon Customer
    • Awesome! Would buy again!
Color: White Size: King Style: 12 IN
I absolutely love the FDW 12 Inch King Mattress! The medium-firm feel is perfect — supportive yet comfortable — and it contours beautifully to my body, relieving pressure points without feeling too soft. The gel memory foam helps keep the mattress cool, and I’ve been sleeping soundly through the night without overheating. Unboxing and setup were a breeze; it expanded fully within a few hours and feels just like the pictures online. The mattress cover is soft, breathable, and adds an extra layer of comfort. Overall, this mattress feels high-quality and luxurious for the price, and it has completely improved my sleep. I would highly recommend it to anyone looking for a comfortable, supportive, and affordable king-size mattress. ... show more
Reviewed in the United States on November 4, 2025 by Kawaiolu&Kahunani
    • Not what I expected and very uncomfortable
Color: White Size: King Style: 12 IN
I bought this mattress hoping to improve my sleep, but it has been a total disappointment. At first it seems comfortable, but as the days go by, you realize that it doesn't offer the support it promises and feels much lower quality than what you see in the photos. Exactly after the first month, the mattress completely lost its shape; now it sags horribly in the middle and I wake up with a lot of back pain. Since the 30-day trial period has already passed, the brand no longer offers any solution or exchange, so you are left with a useless product. For a 12-inch mattress, it doesn't have the necessary firmness and the edges are very weak, so you feel like you're going to fall off if you get close to the side. I don't recommend it at all; it has been a waste of money and now I have to look for another one that actually works. ... show more
Reviewed in the United States on April 29, 2026 by Jeraldine Romero
    • Don't hesitate, just buy it
Color: White Size: Queen Style: 12 IN
Our mattress was getting on in years, and my husband and I didn't want to buy a new one because of a recent surgery and it's associated costs. We decided to 'settle' for a 'cheap mattress' to tide us over for a little while so we could save up for one of the 'better' and more expensive ones.... Wow, were we completely wrong! There's no need at all to spend close to if not more than $1k on a mattress. This one is like sleeping on a firm cloud. The top layer of foam is softer and cushions you just right, and the base foam is much firmer and gives the support your body needs to stay comfortable. When you combine the two, you get a mattress that is amazingly comfortable that you won't want to get out of. Granted, the box was about 80-85lbs, but my husband was able to get it upstairs by himself, though he admitted it would have been easier with a helping hand. Unboxing wasn't too difficult, as we have the space, so we rolled it out and carefully slit the plastic that vacuum seals it down to a few inches thick and let it expand for a little over 24 hours. The instructions state that you should wait 3 days, but no one has the time or space to let a mattress lay on the floor that long. It wasn't needed. Once you stop seeing wrinkles in the cover, you're good to go. We tossed the old one, and put on fresh sheets and were treated to our best nights sleep in quite a while. Our old mattress was a tulo queen size and we paid 3x as much for it years ago. There is no comparison, this new mattress beats it hands down. I recommend turning it every couple of weeks, as it keeps your mattress nice and firm, though I don't know about flipping it... that would put that super soft top layer on the bottom and would kind of defeat the point of even having it. It's been a couple of weeks now, and we have slept super well every night. As the title states, don't hesitate and buy it. You can't beat this kind of comfort for such a low price. My only regret is that we didn't just get the king size mattress! ... show more
Reviewed in the United States on September 27, 2024 by Cheri Gavasto
    • Good quality and firm mattress Good quality and firm mattress
Color: White Size: Twin Style: 12 IN
Review Image by KLA
Good quality and comfortable mattress if you like your mattress on the firm side. However, it is not a full 12inches thick. I bought it specifically because it was 12 inches and I wanted it to fill the space between where the previous mattress and the headboard had a gap. This mattress falls short on filling that gap as it is only 10.5 inches thick. ... show more
Reviewed in the United States on June 21, 2026 Reviewed in the United States on June 21, 2026 by KLA
    • Very Comfortable Mattress
Color: White Size: Twin Style: 12 IN
The mattress arrived in time and is heavier than I expected. I let it rest for 24hrs to fully fill out. 1st night it felt stiff and more firm than I am used to but after a few days I feel very comfortable as the mattress conforms to my body and I sleep very well. I'm very pleased with this mattress and highly recommend it. ... show more
Reviewed in the United States on February 19, 2026 by jose quervo
    • Highly recommend Highly recommend
Color: White Size: Queen Style: 12 IN
Review Image by A.Bo
I have now purchased 4 different kinds of mattresses and always nervous to see what the outcome is going to be. However I feel like I hit the jackpot. Finally! This is truely a wonderful mattress. I purchased the 12". I typically have to add an memory topper because mattresses are too firm, but this one is plush! (And fiberglass free). I am just thrilled! Wish I could chuck the others got and replace with these. It fits great, holds an impression for a bit and allows you to sink in and get a good night's sleep. Highly recommended. ... show more
Reviewed in the United States on April 5, 2026 Reviewed in the United States on April 5, 2026 by A.Bo

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