King Mattress 14 Inch, Strengthened King Size Hybrid Mattresses in a Box with Gel Memory Foam and Individual Pocketed Springs for Support & Pressure Relief, Medium Firm King Mattress
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Size: King
Style: 14 Inch
Features
- KIING SIZE MATTRESS IN A BOX- The Hybrid King Size Mattress measures 76" W x 80" D x 14" H and has a maximum weight capacity of 1100 lbs and fits most kingl size beds. The mattress comes in a boxed compression package and can be installed by yourself, simply place it on the desired bed and unpack it.
- POWERFUL EDGE SUPPORT- The king mattress is upgraded with reinforced individual pocketed springs that provide strong edge support to prevent sagging. Provides enough support for the correct alignment of your spine, absorbs motion interference between partners and gives you a complete night's sleep.
- STAY FRESH AND COMFORTABLE- This is a high density foam mattress designed for all types of sleepers. Designed with soft and breathable knit fabric and multiple memory foam layers, it keeps you from feeling overheated during the night, suitable for all sleeping positions and waking up feeling refreshed.
- PRESSURE RELIEF- This medium firmness king mattress features multiple support layers that allow the mattress to precisely fit every inch of the body, spreading pressure evenly to all parts of the body, relieving pressure points and eliminating body fatigue and pain.
- QUALITY ASSURANCE- This king size mattress comes with a 100 night trial and 10 year support and has been pressure tested 100,000 times for quality. For a perfect sleeping experience, it is recommended that you return the mattress to its optimal condition within 24 hours.
Brand: SIMARTH
Size: King
Product Dimensions: 80"L x 76"W x 14"Th
Item Firmness Description: Medium Firm
Top Style: Euro Top
Cover Material: Fabric
Number of Layers: 3
Fill Material: High density foam and individual pocketed springs
Weight Limit: 1100 Pounds
Special Feature: Pressure Relief
Product Dimensions: 80 x 76 x 14 inches
Item Weight: 95.8 pounds
Manufacturer: SIMARTH
Item model number: SA14K
Date First Available: September 4, 2025
Age Range Description: All Age
Frequently asked questions
This product is currently out of stock. Please check back later for shipping info.
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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Top Amazon Reviews
Size: Queen
Style: 14 Inch
Bought this because my 15 year old needed a new mattress with support. I am loving the hybrid mattresses. Took out of the box and as I removed plastic it popped up to rid full 14" almost immediately. No bad smells. It has some bounce to it but not much. It's firm but medium firm, it has some give to it. We have high bed frames also so some of the give on the sides that others have commented we like because it helps us get down off the mattress lol. I plan to purchase one for my bed soon as I beee a new mattress. I really suggest you buy this. Great price, fast delivery and can use right away. Great support but cozy too.
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Reviewed in the United States on April 15, 2025 by Jennifer Hansbrough
Size: Queen
Style: 12 Inch
Okay, I never write reviews, but I had to for this! I have horrible scoliosis and was just pregnant. I’m now 9 months post and had a memory foam. I’m 39 and had a pillow in between my legs, under my hip, under my stomach. My hips just burned from the dip. So I looked for something much more firm but comfy. I read the reviews and just saw 1 person say “aligned my spine” and I was sold. I absolutely LOVE this mattress. My hips don’t dip, my head and spine stays aligned, I don’t feel the burn, I don’t feel broken trying to get up in the middle of the night and mornings. I highly recommend this for any one with hip/lower back Pain.
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Reviewed in the United States on December 15, 2025 by Gee G.
Size: Queen
Style: 12 Inch
This mattress is very comfortable the overall quality is great it was easy for set it up, fits the frame
Reviewed in the United States on October 31, 2025 by Sam’s D.
Size: Queen
Style: 12 Inch
Came quickly. Super comfortable. Great value for the price. I have a queen 12-in. I love that it came in a box and just did the work itself.
Reviewed in the United States on December 12, 2025 by andrea dragovich
Size: Full
Style: 12 Inch
First time trying a mattress in a box and I'm loving it! The only complaint I have was with shipping. They delivery driver (ups) dropped it next door. Ups shipping for me has always been awful. I just don't see how hard it is to read a number on a house. Can they just not comprehend it or something? I'm including the shipping details because luckily we have good neighbors and I walked over next door to bring it home and the box was absolutely destroyed and on one end there was almost a whole roll of packing tape keeping it shut. I picked up the box which was very heavy but not heavy enough for me to carry it home. Half way In between my home and the neighbors the box ripped making the mattress fall out and it started to roll. I managed to get it home and upstairs where I put it on the frame and opened it. When I unrolled it there must have been a hole somewhere because once un rolled it started hissing and expanding on its own. Then I cut the plastic off and let it expand on its own. Also a side note, the box was labeled with the sizes like twin, full, king, queen but it wasn't marked so I'd suggest measuring the box to make sure it's the right size you ordered. It says on the box to wait 72 hours before sleeping on it but honestly I couldn't help myself and I only waited about 10 and it didn't seem to affect it any. The bed its self is the perfect balance between soft and firm however the edges of the bed are extremely soft. For elderly people it might not be the best as they often have to sit on the edge of the bed and might slide off. This is such a great product and I am VERY happy with this purchase. I would definitely recommend
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Reviewed in the United States on April 3, 2025 by Kyle
Size: King
Style: 12 Inch
Amazing price. Very comfortable
Reviewed in the United States on December 11, 2025 by tim roberts
Size: Queen
Style: 12 Inch
Got to be careful on the edges as the mattress droops. Overall good quality though.
Reviewed in the United States on June 9, 2025 by Maya Wilkerson
Size: Queen
Style: 12 Inch
This 12-inch Queen hybrid mattress has been an excellent investment. The combination of memory foam with springs provides a firm but very comfortable support, ideal for sleeping well all night. It adapts to the body without sinking too much, relieves pressure points and helps keep the spine aligned. In addition, you don't feel the movement if the other person moves. It arrived well packed, it expanded quickly and without bad smells. Now we sleep much better!
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Reviewed in the United States on April 13, 2025 by Oslaidi