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Avenco

Avenco 12 Inch King Size Mattress, Medium Firm Hybrid Mattress in a Box

  • Based on 334 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, Oct 27
Order within 8 hours and 24 minutes
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Size: King (U.S. Standard)


Set name: 12 Inch


Features

  • Targeted Support: Avenco Hybrid Mattress features SmartS Coil pocket springs that offer targeted support and adapt to body curves. Helps align your spine and reduce pressure, providing balanced comfort for back, side, and stomach sleepers.
  • Cooling NanoGel Foam: Stay cool with NanoGel memory foam that promotes airflow and prevents overheating. The breathable cover keeps your King Size Mattress fresh and comfortable, offering a cool night sleep for hot sleepers.
  • Motion Isolation: Individually wrapped coils and premium foams absorb movement and minimize motion transfer. Enjoy quiet, undisturbed rest with this King Mattressideal for couples seeking stability and peace.
  • Reinforced Edge Support: The 12 Inch Hybrid Mattress uses strong edge coils to prevent sagging and slipping. High-density foam ensures lasting comfort and durability, letting you sit or sleep safely near the edges.
  • Easy Setup & Certified Safe: The Avenco Mattress in a Box is compressed and vacuum-sealed for quick setup. Let it expand 4872 hours. CertiPUR-US certified materials ensure safety and peace of mind for you and your family.

Brand: Avenco


Size: King (U.S. Standard)


Product Dimensions: 79.92"L x 75.98"W x 12"Th


Item Weight: 83.5 pounds


Item Firmness Description: Medium


Top Style: Euro Top


Cover Material: Cotton


Number of Layers: 4


Fill Material: Gel Memory Foam


Special Feature: Breathable, Low Motion Transfer, Pressure Relief


Item Firmness Description: Medium


Number of Layers: 4


Additional Features: Breathable, Low Motion Transfer, Pressure Relief


Mattress Coil Type: Pocketed Coil


Construction Type: Pocket Spring


Number of Mattress Coils: 750


Size: King (U.S. Standard)


Item Dimensions L x W x Thickness: 79.92"L x 75.98"W x 12"Th


Item Weight: 83.5 pounds


Item Thickness: 12 inches


Item Depth: 12 inches


Item Dimensions: 79.92 x 75.98 x 12 inches


Cover Material: Cotton


Fill Material: Gel Memory Foam


Mattress Comfort Layer Material: Comfort Foam


Material Type: Gel Foam


top-style: Euro Top


Color: Grey


Style Name: 12 Inch


Brand Name: Avenco


Model Name: AOMSP3012KGYN1


Product Benefits: Back Pain Relief, Improves Sleep, Pressure Relief, Stress Relief


Model Number: AOMSP3012KGYN1


Number of Items: 1


Mattress Type: Standard Mattress


Number of Packs: 1


Global Trade Identification Number: 04


Manufacturer: PT Prestova Home Living Indonesia


Manufacturer Warranty Description: 10 years manufacturer warranty.


Item Highlight: SmartS Coil Pocket Spring, Gel Memory Foam for Cool Night Sleep, Motion Isolation, Pressure Relief, CertiPUR-US Certified


Unit Count: 1 Count


Included Components: No


Item Type Name: Bed Mattress Conventional


Manufacturer Part Number: AOMSP3012KGYN1


Set Name: 12 Inch


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Oct 27

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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Top Amazon Reviews

    • Nice item.
Size: Twin Set name: 8 Inch
Worked very well in a bunk bed for a 7-year-old grandson. He stated that it was comfortable.
Reviewed in the United States on September 26, 2026 by BearTracker
    • Great for back sleepers!
Size: Twin Set name: 10''
Excellent mattress, especially at this price point. For side sleepers it may be a little soft, but it's a great option if you sleep on your back as I do. Have been using it since 2022, and it's still going strong. 10/10 would recommend.
Reviewed in the United States on August 13, 2026 by Farmhouse Fanatic
    • Great for kids
Size: Twin Set name: 6 Inch
Comfortable mattress my kids love it
Reviewed in the United States on September 30, 2026 by Maribel palomares
    • Worth what you're going to pay.
Size: Queen Set name: 8 Inch
The mattress took almost no time at all to fully inflate and we had it on the frame same day. You can definitely tell it's only 8" thick but that's nothing a mattress topper can't fix. Beyond that, the mattress is SUPER comfortable and a good quality and price for what we received. It is a bit small in fitting the queen size frame I bought but that was expected when ordering a "kids" mattress. There was a little bit of an odor from factory, but it went away within 24hrs and wasn't overbearing at all. ... show more
Reviewed in the United States on April 6, 2026 by Storm
    • Sleep as on mother arms
Size: Full Set name: 10 Inch
Sleep as on mother arms. The mattress expanded fully within about 2 days after unboxing and had only a slight odor that disappeared quickly. The combination of pocket coils and memory foam provides a nice balance between support and comfort. I primarily sleep on my side and back, and the mattress does a good job relieving pressure on my shoulders and hips while still supporting my lower back. One thing I noticed is that motion isolation is pretty good. My partner's movements don't disturb me nearly as much as they did on our old mattress. The edge support is also better than expected. The cooling feature seems to help somewhat. It doesn't feel cold, but I don't wake up overheating like I did on my previous all foam mattress. The medium firmness feels accurate comfortable without being too soft or too firm. ... show more
Reviewed in the United States on June 17, 2026 by Vlad
    • Horrible mattress but amazons return policy is awesome and convenient
Size: King (U.S. Standard) Set name: 12 in
I ordered a king. It was about 6 inches too short compared to the king I had and the one I just got to replace this one. The overall build quality of the bed seemed ok. The memory foam wasn’t very good as you can almost feel the springs. It was not at all comfortable for me or my wife (I’m 200Lbs and she’s 120Lbs). We both had the same issues with it as far as the feeling the springs and bot feeling rested after a night of sleep. Plus the added bit of back pain. I am a very heavy sleeper and she is a very light sleeper. She told me every single time I moved in the bed, I woke her up because the whole bed moved. We were coming from a memory foam mattress and wanted to try a hybrid. This was NOT, AT ALL a good move. This bed is very uncomfortable considering we like and are used to memory foam mattresses. It really doesn’t provide good support in our opinion. We returned it an got another memory foam mattresses and have been VERY happy with it. If you are coming from a memory foam mattress, do not buy a hybrid mattress. Stick with memory foam as this type of mattress is going to be a huge disappointment. On another note, Amazon’s return policy is excellent. Since this bed is sold and shipped by Amazon, the return is super convenient. They send a truck to your house during a scheduled time window and they take the mattress from you and that’s that. Kudos to Amazon for making the return process completely painless. ... show more
Reviewed in the United States on August 19, 2025 by michael
    • Comfortable sleep
Size: Full Set name: 10 Inch
Review Image by Ainsley Johnson
Review Image by Ainsley Johnson
Review Image by Ainsley Johnson
Review Image by Ainsley Johnson
This mattress is better than I expected. It has zero odor. The quality sleep it provides proved it’s worth every penny. It’s a nice firm mattress. I would definitely buy again.
Reviewed in the United States on August 6, 2026 by Ainsley Johnson
    • The bed of very comfortable.
Size: Twin Set name: 6 Inch
The bed is just right, I bought it to have it at my son’s house.
Reviewed in the United States on August 13, 2026 by Virgo

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