14 Inch King Size Mattress | The Feel Most Sleepers Prefer King Mattress Hybrid | Contouring Memory Foam Comfort & Balanced Support for Back and Side Sleepers – Medium-Firm | No Fiberglass
Condition: New
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90-day refund / replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Jul 30 – Jul 31
Recently Viewed
Color: White
Size: King
Style: 14 Inch
Features
- Medium-Firm Feel That Fits Most SleepersWe tuned the foam layers to avoid being too soft or too hard. During test sleep sessions, people of different body types felt supported without sinking, especially when switching from back to side. Its a safe choice if youre not sure what firmness you like.
- Zoned Support That Helps Your Back Feel More RelaxedThe coils are firmer in the middle and softer around the shoulders. In testing, this design helped keep the lower back from dipping while allowing the upper body to settle comfortably. Users described it as natural alignment without forcing my posture.
- 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.
- Low Motion Transfer for CouplesEach spring moves independently, which reduced movement felt during partner-motion tests. Sleepers noticed fewer disturbances when someone turned or got upideal for lighter sleepers.
- Certified Safe + 10-Year Warranty Made with CertiPUR-US certified foams, free from harmful chemicals. Your COMFBOX comes with a 10-year warranty and arrives vacuum-packed for easy setup. Let it fully expand within 72 hours and sleep easy knowing youre protected.
Brand: COMFBOX
Size: King
Product Dimensions: 80"L x 76"W x 14"Th
Item Weight: 74 Pounds
Item Firmness Description: Medium Firm
Top Style: Pillow Top
Fill Material: Gel Memory Foam, High Density Foam
Special Feature: Enhanced Lumbar Support, Pressure Relief For Side SLeep, Reinforced Edge Support
Color: White
Coil Type: Pocketed Coil
Item Firmness Description: Medium Firm
Additional Features: Enhanced Lumbar Support, Pressure Relief For Side SLeep, Reinforced Edge Support
Mattress Coil Type: Pocketed Coil
Construction Type: Hybrid
Is Customizable?: No
Size: King
Item Dimensions L x W x Thickness: 80"L x 76"W x 14"Th
Item Weight: 74 Pounds
Item Dimensions: 80 x 76 x 14 inches
Fill Material: Gel Memory Foam, High Density Foam
Mattress Comfort Layer Material: Comfort Foam, Memory foam
Material Type: Foam, Memory Foam
Brand Name: COMFBOX
Model Name: COMA4
Product Benefits: Back Pain Relief, Posture Support, Pressure Relief
Model Number: COMA4
Manufacturer: COMFBOX
Included Components: NO
top-style: Pillow Top
Color: White
Style Name: 14 Inch
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Jul 30 – Jul 31
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Learn more about financing & leasing here.
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Top Amazon Reviews
This is a great mattress at a great price. Very comfortable and supportive while also having that soft upper layer comfort. I have had this for a few weeks and find it to be well made. I was surprised how heavy it was when delivered. I’d recommend the 12 inch thickness as it offers great support while being manageable for bedding sheets. I slept on it one night and I am 240 lbs with lower back issues from two spinal fusions and I had a great nights sleep, feeling good in the morning. I just had two family members in from Houston who slept on it two nights as well. It’s in the guest room and they loved it too. The woman is 140 lbs and the husband around 300 lbs. Both commented how great they slept and they are now buying the same mattress for their home. I don’t agree with a few comments about edge support being poor. The edge support is as good or better than mattresses I have used from top manufacturers at 3 times the cost. The issue from these customers may be that they either received their mattress beyond the 3 month manufacturing date or they let it sit a while before opening. Make sure the created on date or manufacturing date label on the outside of the box is less than 3 months from when you receive it. If not, return it before opening. If it was manufactured less than 3 months from receiving it make sure you open it within two days and then allow it to sit and expand over a full 3 days (72 hours) before using it. A vacuumed packed hybrid mattress (memory foam and independent coils) can suffer from permanent deformations in the foam and coils if not opened within that 3 month period from manufacturing. All I can say is this is a great mattress for a great price. I seriously doubt you can find anything better at a price point of around $200 for a 12-inch thick queen mattress. Firm yet soft at the same time. Sweet dreams!.
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Reviewed in the United States on July 29, 2025 by Gina K
Color: White
Size: King
Style: 14 Inch
Honestly, I was very impressed with this. I was skeptical due to the price and the few people that wrote negative reviews, but upon sleeping on this, my back has improved as well as my hips I’m sleeping a lot better than before. I was genuinely torn between a purple mattress and this, but this is awesome and it’s very firm so if you’re not a firm type of person when it comes to mattresses, I wouldn’t recommend but for the people who like firmness and have back issues this mattress is awesome especially for the price. It’s a very thick mattress. My boyfriend and I waited the entire period of 72 hours of it coming out of the box before we slept on it as well. It’s super comfortable. We love it. We saved thousands of dollars by buying this!
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Reviewed in the United States on January 18, 2026 by It was awful. It smelled like throw up. When I attempted to wash it completely fell apart and messed up my washing machine.
I bought this Queen size hybrid mattress a few weeks ago and it has been one of the best decisions. The combination of memory foam with interior springs is perfect: it provides the ideal support while still feeling soft and comfortable. The cooling top layer really works, I no longer wake up sweating at night like before. In addition, I have noticed great relief in the pressure of the back and hips. I wake up much more rested and without pain. Another plus point is the 365-night trial. It gave me a lot of confidence to know that I could try it calmly. But honestly, from the first night I knew I wouldn't return it. I totally recommend it if you are looking for quality, freshness and comfort in a single mattress!
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Reviewed in the United States on August 1, 2025 by Idalys Rodríguez Perez
Showed up in great shape. The description was a plush mattress it is comfortable but could use a bit more padding on the top. This is the reason for the 4-star rating. Other than that, we are very happy with this purchase
Reviewed in the United States on December 1, 2025 by Amazon Customer
The media could not be loaded. This mattress is extremely comfortable and supportive. It provides a perfect balance between softness and firmness, cradling the body while keeping the spine properly aligned. Pressure points, especially on shoulders and hips, are noticeably reduced.The materials feel durable and high-quality, giving the impression that it will last a long time. Overall, it’s a reliable and comfortable mattress that delivers a restful night’s sleep. Highly recommended.
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Reviewed in the United States on November 17, 2025 by Elisabet Gari
Ok mattress but over the last 3 month's it has been falling more and more has been rotated kinda of disappointed cant get ahold of of company to try to figure it out Wasn't sleeped on for the first 3 days as said in instructions
Reviewed in the United States on November 26, 2025 by Doesn't stick to plastic (cleaned to videos showed)
Really great for the price. I've had it almost a year now. Still firm and comfy.
Reviewed in the United States on March 5, 2026 by Romwrit
I am so happy with this Hybrid Mattress! The 12-inch queen size is the perfect balance of comfort and support. The contouring memory foam hugs the body just right, while the innerspring coils add that extra bounce and stability so it never feels too soft or too firm. The cooling top layer has been a game changer, I no longer wake up hot in the middle of the night. The medium-firm feel is spot on for pressure relief, especially for my back and shoulders, and I’ve been sleeping deeper and waking up with less stiffness. It honestly feels like a luxury mattress but at a much better price.
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Reviewed in the United States on August 22, 2025 by Pablo Sánchez