COMFBOX 12-inch King Hybrid Mattress - Medium Feel - Cooling Foam & Pressure Relief
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COMFBOX

COMFBOX 12-inch King Hybrid Mattress - Medium Feel - Cooling Foam & Pressure Relief

528 ratings
COMFBOX 12-inch King Hybrid Mattress - Medium Feel - Cooling Foam & Pressure ReliefCOMFBOX 12 inch King Hybrid Mattress Medium Feel Cooling Foam Pressure ReliefCOMFBOX 14 Inch Queen Hybrid Mattress Medium Firm Cooling Gel Memory Foam Innerspring Pressure Relief 365 Night Trial Forever WarrantyCOMFBOX 12 Inch Queen Hybrid Mattress Medium Firm Cooling Gel Memory Foam Innerspring Pressure Relief 365 Night Trial Forever Warranty
Bed SizeKing
Mattress Thickness12 in

Key item features

  • Adaptive Comfort: Gel memory foam adapts to side, back, and stomach sleeping positions, effectively relieving pressure and providing precise support for all sleepers.
  • Targeted Support: Zoned individually wrapped coils and reinforced lumbar foam deliver targeted support for the hips and lower back, helping reduce pain and improve posture.
  • Cooling Design: Moisture-wicking fabric combined with encased coils enhances airflow to keep you cool and dry all night.
  • Undisturbed Sleep: Shock-absorbing springs minimize partner or pet disturbances, while reinforced edges expand the usable sleeping area.
  • Safe Materials: Made with CertiPUR-US certified safe materials, ensuring a reliable and comfortable sleep surface.
  • Easy Setup: Ships in a box and fully expands within 72 hours for quick and convenient installation.
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Specs

Bed size, KingMattress comfort level, MediumMattress type, Hybrid MattressesMattress thickness, 12 inBrand, COMFBOXMaterial, Gel Memory Foam

About this item

Product details

Experience customized comfort with the COMFBOX 12” King Hybrid Mattress. Designed for all sleep styles, it features gel memory foam that gently contours to your body and zoned pocket coils for targeted support. Reinforced lumbar foam relieves pressure on the hips and lower back, promoting better posture and reducing pain. Stay cool and dry with breathable, moisture-wicking materials and enhanced airflow. Motion-isolating coils ensure undisturbed sleep, even with partners or pets. With CertiPUR-US® certified foams and a 10-year warranty, this mattress offers comfort you can trust—delivered in a box for easy setup.
  • ‌Comfortable sleep with precise support for all sleepers. Gel memory foam adapts to side, back, and stomach sleeping positions, effectively relieving pressure. Zoned individually wrapped coils and reinforced lumbar foam deliver targeted support for the hips and lower back, helping reduce pain and improve posture.
  • Cool and breathable shock-absorbing design: moisture-wicking fabric combined with encased coils enhances airflow to keep you cool and dry all night. Shock-absorbing springs minimize partner or pet disturbances, while reinforced edges expand the usable sleeping area.
  • Made with CertiPUR-US certified safe materials. Easy to set up. Backed by a 10-year limited warranty. Ships in a box and fully expands within 72 hours for quick and convenient installation.
info:
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Specifications

Bed size

King

Mattress comfort level

Medium

Mattress type

Hybrid Mattresses

Mattress thickness

12 in

Warranty

Warranty information

Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.

Customer ratings & reviews

4.4 out of 5 stars
stars
528 ratings170 reviews
Includes global ratings and reviews
How item rating is calculated
  1. 5 stars74% (393)
  2. 4 stars7% (36)
  3. 3 stars5% (29)
  4. 2 stars4% (21)
  5. 1 star9% (49)

Reviews summary

Pros

  • : Offers high-quality features at a lower cost.
  • : The mattress provides balanced support with cooling foam.
  • : Provides pressure relief around the hips and lower back.
  • : The mattress reduces back pain and allows restorative rest.
  • : The mattress balances softness and support for back comfort.

Neutral

  • : Can be medium and pressure-relieving, but also firm with noticeable springs.
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Showing 1-3 of 170 reviews

Nov 7, 2026
Reviewer name: Brianna
Item details
Bed size: Queen
Mattress thickness: 12 in
Sold and shipped byCOMFBOX
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

The mattress is amazing definitely will recommend to a friend or family. This mattress came as every thing in it's description easy set up once you open the package. Make sure to read instructions and use the tool as instructed.

Helpful?434E7FBAHC3K16961313178
Nov 9, 2026
Reviewer name: rose
Item details
Bed size: King
Mattress thickness: 12 in
Sold byCOMFBOXDelivered byWalmart
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

I've only had this bed for two sleeps, but WOAH can I tell a difference! As a MEMORY FOAM STAN, this bed really takes the cake. I slept so peacefully. At first, I was skeptical of the springs, but you really can't tell they're there. My kid even did a face plant on the bed, and there was no heavy recoil on my back! I'll be ordering another one for him!

Helpful?434E7FBAHC3K16961313178
Oct 29, 2025
Reviewer name: adit
Item details
Bed size: Queen
Mattress thickness: 14 in
Sold byCOMFBOXDelivered byWalmart
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Perfect Balance of Comfort and Support!

This COMFBOX hybrid mattress has completely transformed my sleep! The medium-firm feel is just right - supportive enough for my back but with that plush memory foam comfort on top. I love how the cooling gel keeps me from overheating at night, which was a huge problem with my old mattress. The quality feels exceptional, and knowing I have a 365-night trial and forever warranty gives me total peace of mind. Setup was easy, and after three weeks, I’m waking up without any aches. Highly recommend if you want hotel-quality sleep at home!​​​​​​​​​​​​​​​​

Helpful?434E7FBAHC3K16961313178
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4.5 out of 5 stars
4.5 stars out of 5, based on 84 seller reviews(4.5)
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