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COMFBOX

COMFBOX King Size Mattress, 12 Inch Springs Hybrid King Matress, Bed in a Box, Soft and Breathable, Pressure Relief & Motion Isolation, Medium Firm Feel

  • Based on 109 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Sep 5
Order within 17 hours and 26 minutes
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Color: White


Size: King


Features

  • Strong Edge Support for Real-Life UseWe reinforced the edge coils so the sides wouldnt collapse when sitting or getting in and out of bed. Test sleepers said they felt more secure near the edgesimportant for couples who use the full width of a king mattress.

Brand: COMFBOX


Size: King


Product Dimensions: 80"L x 76"W x 12"Th


Item Weight: 71 pounds


Item Firmness Description: Medium


Top Style: Pillow Top


Cover Material: Knit Fabric


Number of Layers: 4


Fill Material: Gel Memory Foam


Weight Limit: 500 pounds


Item Firmness Description: Medium


Number of Layers: 4


Weight Capacity Maximum: 500 pounds


Additional Features: Enhanced Lumbar Support


Mattress Coil Type: Pocketed Coil


Construction Type: Hybrid


Number of Mattress Coils: 700


Size: King


Item Dimensions L x W x Thickness: 80"L x 76"W x 12"Th


Item Weight: 71 pounds


Item Thickness: 12 inches


Item Dimensions: 80 x 76 x 12 inches


Cover Material: Knit Fabric


Fill Material: Gel Memory Foam


Product Care Instructions: Allow Mattress To Fully Expand After Unboxing Before Use


Mattress Comfort Layer Material: Comfort Foam


Material Type: Memory Foam


Brand Name: COMFBOX


Model Name: 14 Inch Queen Spring Mattress


Product Benefits: Pressure Relief


Model Number: COMA5


Mattress Type: Standard Mattress


Manufacturer: COMFBOX


Included Components: Mattress


Manufacturer Part Number: COMA5


top-style: Pillow Top


Color: White


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Sep 5

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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Leasing options through Acima may also be available during checkout.

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Similar Products

Top Amazon Reviews

    • Comfy!
Color: White Size: Twin
I got this for my sons room. He was originally on my old mattress I had as a kid so it was time for a new one. We chose this for the medium firmness and it Definitely was worth the price. My son says it helps him sleep a lot better and it is super comfy. It is the first spot he goes to as soon as he gets home from school! Also bonus, it did not have a smell when it came out of the wrapping! Definitely let it rise for the full 72 hours before using it cause it fluffs up a lot! ... show more
Reviewed in the United States on January 5, 2026 by Tracy
    • Super Comfortable and Easy to Set Up!
Color: White Size: Twin
Review Image by Jimi Adams
The hybrid design with memory foam and pocket springs gives the perfect balance of softness and support. It’s firm enough to provide good back support but still has that plush, cozy feel that makes it easy to fall asleep. There’s also no chemical smell after unboxing, which was a nice surprise. It’s perfect for a guest room, kid’s room, or dorm, and the price is a great value for the comfort you get. I’ve been sleeping on it for a few weeks now and wake up feeling rested and ache-free. Highly recommend if you’re looking for a comfortable, affordable, and easy-to-set-up twin mattress! ... show more
Reviewed in the United States on October 30, 2025 by Jimi Adams
    • Great mattress!!
Color: White Size: Twin
Soooooo comfortable!!! So soft against skin too! Only con is if your clothes are a bit on the softer the side then you might feel like you will slide right off😂 love how thick the mattress is!
Reviewed in the United States on March 17, 2026 by Julie V
    • Good pick for mattress
Color: White Size: Twin
Give it 48 hrs to expand to full size. Comfortable. Smell we left it outside. Solid fit for a twin.
Reviewed in the United States on February 7, 2026 by The Iron Daisy
    • Great Value Hybrid Mattress
Color: White Size: Twin
Review Image by Mi
This 10-inch Twin mattress is an excellent choice for anyone seeking a balance of support and comfort. The medium-firm hybrid design delivers the perfect feel—you get the pressure relief of memory foam without that "sinking in" feeling, thanks to the coil support below. It expanded easily out of the box and has no noticeable chemical smell. The zoned pressure relief really makes a difference, keeping my spine aligned and resulting in less tossing and turning. Knowing it's Fiberglass Free and made with Certified Safe Foams & Fabric adds great peace of mind. Highly recommend this affordable, comfortable 'mattress in a box' solution! ... show more
Reviewed in the United States on November 10, 2025 by Mi
    • Good value for the money and easy setup
Color: White Size: Twin
Review Image by miaty
Review Image by miaty
Review Image by miaty
Review Image by miaty
Great purchase. The mattress is soft with support and comfortable—just perfect for a great night's sleep. The unpacking process was also a breeze. All I had to do was take it out of the box, remove the protective membrane, and the mattress basically unfolded itself. Super easy to set up, no hassle at all. Overall, I'm really pleased with how cozy and supportive it is, and good Value for the money ... show more
Reviewed in the United States on October 28, 2025 by miaty
    • If you need some firm mattress. This is a great one.
Color: White Size: Twin
Review Image by Super Tiger
It’s a firm mattress with great support — an excellent spring mattress. I prefer a slightly firmer bed since I’m tired of those overly soft ones. This mattress is beyond of my expectation. We’re really growing to love this mattress — our whole family prefers firmer ones. I especially enjoy taking my naps on it at noon; it gives me great support and it’s so nice to rest there undisturbed. ... show more
Reviewed in the United States on October 11, 2025 by Super Tiger
    • Really comfy and easy setup
Color: White Size: Twin
This mattress was super easy to unpack and set up. It expanded fast and didn’t have any strong smell. The medium-firm feel is just right—comfortable but still supportive. I sleep great on it and wake up without aches. Love that it’s fiberglass-free too. Great mattress for the price!
Reviewed in the United States on December 21, 2025 by A5 Game Club

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