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Zinus

Zinus 12 Inch Foam and Spring Hybrid Mattress [New Version], King, Fiberglass Free, Medium Firmness, Durable Support, Certified Safe Foams & Fabric, Mattress in A Box

  • Based on 32,493 reviews
Condition: New
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Availability: In Stock.
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Color: White


Size: King


Style: 12"


Pattern Name: New Small Box


Features

  • TRADITIONAL SUPPORT, BETTER FOR THE PLANET This reliably comfortable hybrid will provide even support night after night and arrives to you in a new smaller box that reduces its carbon footprint
  • RELIABLE SUPPORT - Heavy-gauge steel coils are interconnected to deliver consistent, durable support from head to toe
  • MADE TO LAST Durably designed to last you for years to come; twin mattress supports a maximum weight of 250 lbs, while all other sizes can support up to 500 lbs
  • CERTIFIED SAFE MATERIALS Crafted from high-quality CertiPUR-US certified foam and wrapped with an OEKO-TEX certified mattress cover all produced without the use of harmful chemicals for safer, healthier sleep
  • WORRY-FREE WARRANTY A 10-year limited warranty is included for added peace of mind

Description

The Foam and Spring Hybrid Mattress provides even, perfectly cushioned support for consistently good sleep and well-rested mornings. Top-quality foam layers and reliable springs work together to create a comfortable surface with a strong, supportive base layer. Made with Certi-PUR US® certified foams, this hybrid mattress guarantees the highest quality and no harmful chemicals where you sleep. This mattress is expertly compressed, packed, and shipped to you in one convenient box—complete with a 10-year limited warranty to put any other worries to rest.

Brand: Zinus


Size: King


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


Item Weight: 94.88 Pounds


Item Firmness Description: Medium


Top Style: Tight Top


Cover Material: Polyester or Polyester Blend


Number of Layers: 2


Fill Material: Foam


Weight Limit: 500 Pounds


Item Firmness Description: Medium


Number of Layers: 2


Weight Capacity Maximum: 500 Pounds


Additional Features: Breathable


Mattress Coil Type: Bonnell Coil


Construction Type: Hybrid


Number of Mattress Coils: 350


Is Customizable?: No


Portable: No


Is Foldable: No


Size: King


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


Item Weight: 94.88 Pounds


Item Dimensions: 80 x 76 x 12 inches


Item Depth: 12 inches


Cover Material: Polyester or Polyester Blend


Fill Material: Foam


Product Care Instructions: Spot Clean Only


Mattress Comfort Layer Material: Memory foam


Material Type: Foam, Polyester, Spring


Brand Name: Zinus


Model Name: Foam and Spring Mattress


Product Benefits: Enjoy eco-friendly packaging, reliable support from heavy-gauge steel coils, long-lasting durability, safe materials, and a worry-free warranty with this medium-firm hybrid mattress.


Model Number: ZU-MSSA2BZI-12K


UPC: 841550363272


Global Trade Identification Number: 72, 26


Manufacturer: Zinus


Manufacturer Warranty Description: Worry-free 10 year limited warranty included.


Set Name: King 12


Manufacturer Part Number: ZU-MSSA2BZI-12K


Unit Count: 1.0 Count


Included Components: Mattress


Age Range Description: Adult


Item Type Name: Bed Mattress Conventional


top-style: Tight Top


Color: White


Shape: Rectangular


Style Name: 12"


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: within 30 days

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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Similar Products

Top Amazon Reviews

    • Comfort and support at a good price
Color: White Size: Full Style: 8" Pattern Name: New Small Box
This hybrid mattress combines foam and springs to offer a balance between comfort and support. Its medium firmness makes it suitable for various types of sleepers, while its fiberglass-free design and certified materials provide added peace of mind. It is a practical and affordable option, especially considering that it comes compressed in a box for easy transport. It is ideal for those seeking basic quality with good daily performance. ... show more
Reviewed in the United States on April 17, 2026 by migdalisa
    • I'm a side then move to back sleeper & my husband is a back sleeper & we both sleep like the dead in this bed
Color: White Size: King Style: 12" Pattern Name: Original Box
There is no kind way to start this review so I'm just going to be blunt because you deserve blunt in mattress buying - it is SO important to be clear because a good/bad mattress GREATLY impacts your life! So here we go with the blunt - are you ready?! We're short, fat people. No. Really! About 100lbs overweight each. Don't judge - we have our reasons & I'm not sharing to open myself up to ridicule + with the New Year we are committed to losing! So why do you need to know we're fat, short people?! So you will know that because of our sizes we have really put this mattress through a workout since we bought it in August...and it is FABULOUS!!! I'm a side then move to back sleeper & my husband is a back sleeper & we both sleep like the dead in this bed! The bed is NOT hot, when we climb in (hello- we're short gotta climb!) we can tell there are springs, but when we lay down we don't feel them (no poking, etc.), and overall our bodies just feel well supported in a not too firm way! To think we bought this as a temporary bed - just to have since we moved 2200 miles & weren't taking our old mattress with us. We figured after we found a house to buy we'd upgrade - found the house faster than we planned & now this bed is coming from our temporary apartment to our house!!! With the outlay of so much money updating the house it's nice to not have to invest in a new bed! Just to give you a comparison - previously we had the Lucid 10" (https://www.amazon.com/gp/product/B00478U768/ref=oh_aui_search_detailpage?ie=UTF8&psc=1) which at the time we spent $349 on & is now priced at $287 as it should rightfully be priced less than this bed because the Lucid SUCKED! It was comfortable for about the first 6 months & then it started forming a divot in the shape of our bodies & gotta say - even when you are the person making the divot you still don't want a fat person divot in your bed! The Lucid was also REALLY hot - we would sweat on a winter's night while it was raining outside & the inside of our house was never warmed to more than 68°F! The divot also affected smoochy-smoochy time (divots are REALLY not conducive to that!). We kept the Lucid for about 18 months after we were both disgruntled with it because we knew we were moving & wanted to move small. For the last 6 months I didn't even sleep with my husband. I slept in this recliner (https://www.amazon.com/gp/product/B002WGJHHW/ref=oh_aui_search_detailpage?ie=UTF8&psc=1) in the living room & got WAY better sleep in a cheapo (yet fabulous) recliner that's NOT made for fat people than I ever did in the Lucid! Bottomline - this fat lady has sung! Mattress buying is over! If we need another mattress at some point we'll be buying this one again! Already decided to buy the Queen size for our guest room & the 8" Twin for our children! I feel like Oprah - guests get a Zinus, children get a Zinus, everyone (in our family) gets a Zinus! Now that you're done reading my review - YOU go get yourself a Zinus!!! ... show more
Reviewed in the United States on January 31, 2018 by JET
    • Good mattress for the price
Color: White Size: Full Style: 12" Pattern Name: New Small Box
This mattress is pretty comfortable, it does have a few flaws like some lines and such that aren’t even.
Reviewed in the United States on June 11, 2026 by Cheyanne Rhenae
    • Very Good Support
Color: White Size: Queen Style: 8" Pattern Name: New Small Box
This review is for the 8in mattress. Nice and firm mattress. I'm 6'4, 275lbs and this mattress offers good support and comfort from head to toe. I have it set up on a simple metal base and the feel is firm/extra firm imo. At least in the 8in version. Even at my size and weight I do not sink into this mattress, there is no sagging, and its easy to move about on. You truly sleep atop this mattress and not in it, so to speak. The padding is responsive, the springs feel strong, it feels quality so far as a bed in a box is concerned. Very satisfied with this purchase and if in want of a FIRM mattress this may be for you. YMMV, of course. What is firm for me may be less so for some, too firm for others. But for me its excellent. Oh, and that includes very good edge support. Lay at the edge, sit at the edge, whatever. It will not collapse, you won't go rolling off. Exceedingly happy with this mattress. ... show more
Reviewed in the United States on March 21, 2026 by J.H.
    • It’s a great little twin mattress
Color: White Size: Twin Style: 6" Pattern Name: New Small Box
My baby loves it it’s soft yet firm enough for him the material isn’t itchy it’s clean and has no weird smells . It inflated with no issues and that’s the part he likes the most . He got a good nights sleep and I asked him if he wants me to get a different brand and he said no do his quality of sleep is good ... show more
Reviewed in the United States on April 20, 2026 by Renate Carter
    • Cheap Mattress that Feel Cheap
Color: White Size: Twin Style: 8" Pattern Name: New Small Box
It’s an ok bed. Would be ok for a kid I think but it’s not well made enough for an adult. It doesn’t have good edge support and you can feel and hear how cheap the underlay is on the mattress when getting in and out of bed. It’s harder than I thought it would be. I wouldn’t buy it again.
Reviewed in the United States on March 29, 2026 by Michelle Tuller
    • Zinus mattress, Full Size
Color: White Size: Full Style: 10" Pattern Name: Original Box
Oh my goodness! I am so pleased with this mattress! I got it early, which was nice. It was delivered by UPS,and I am grateful that they were good enough to bring it to the top step outside my front door. It was raining, but it was well packaged. I got it upstairs ( no easy fete, as I'm 5 ft 2 and am slightly older- don't ask! 😉 ) I noticed on the outside of the box that the mattress should be unpacked within 72 hours ( for proper inflation, I think? ) I'd bought a twin in this brand before, but hadn't noticed that piece of information. The twin, BTW, was also a great purchase. Some reviews aren't as favorable as mine, and I wonder if that piece of unpacking info might be a factor. It's a good idea, regardless. In any event, this mattress will be left for proper and full inflation before I put it on the bed (that's due, tomorrow.) Hopefully that will be reviewed as favorably as this mattress. This mattress is just the right firmness and is soft to the touch. It is a very nice product, and I am so glad I bought it. I definitely recommend it! ( make sure you pay attention to that 72 hour caveat, though. I don't think they would include it if it didn't matter. ) The funny little warning advisory was appreciated, too. " Hand this to the responsible one... It knows Kung Fu." I have quick reflexes, as well, so... 😉 The price point was excellent, too. Very much appreciated! UPDATE: I've had this for a bit and unfortunately, my initial enthusiasm has lessened. Still a nice enough mattress, but has minimal side support. I'm going to put it in my second bedroom on the bed I also got from Amazon ( too masculine ) and have ordered a fuller and hopefully a firmer mattress. This was a 10 inch, and that was my mistake. In order to get the height, I ended up buying a 3 inch memory foam and two ( supposedly ) 4 inch mattress toppers. All in, they might equal the 12 inch that I finally ordered. Zinus is a good product, but if you want better side supports and a taller mattress, order one from the start. It turned out to be an expensive lesson. ... show more
Reviewed in the United States on April 3, 2024 by Vera Hensley
    • Worth it
Color: White Size: Twin Style: 6" Pattern Name: Original Box
Perfect and comfortable!
Reviewed in the United States on June 7, 2026 by Tracy Okeefe

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