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Sleepmax

Sleepmax Extra Firm King Mattress 12 Inch - Deep Sleep Hybrid Mattress Pressure Relief - Deluxe Cooling Bed in Box for Back & Side Sleepers - CertiPUR-US Certified, 365-Night Trial, Forever Warranty

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$399.99 Why this price?
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Availability: Unavailable
Fulfilled by Sleepmax USA
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Color: Grey


Size: King


Set name: 12'' Luxe


Features

  • PAIN RELIEF & MOTION ISOLATION - Blending the benefits of traditional spring and soft foam mattresses, Sleepmax Starry promotes spinal alignment, even weight distribution, and alleviation of pressure points for restful sleep. With individually pocketed springs, it reduces noise and motion transfer, catering to light sleepers.
  • BALANCE OF COMFORT & SUPPORT - Featuring a Euro top design for enhanced comfort, multiple layers of foam for pressure relief, and a sturdy bottom support system with reinforced pocket springs, Sleepmax Starry mattress offers a firm feel that caters to a wide range of sleep preferences.
  • NON-TOXIC MATERIALS & SKIN FRIENDLY - Sleepmax Starry's hybrid mattress holds CertiPUR-US and OEKO-TEX Standard 100 certifications, ensuring non-toxic, fiberglass-free materials. It meets the fire-resistant CFR1633 STANDARD, prioritizing safety and skin-friendly composition.
  • ENHANCED SAFETY & EXTENDED LIFESPAN - Reinforced with strong edge support to prevent sagging and enhance stability, the Sleepmax Starry mattress offers added safety by reducing the risk of rolling off during nighttime movements. Its reinforced edges also safeguard the internal structure, extending the mattress's longevity.
  • ABOUT SLEEPMAX - For a decade, Sleepmax offers an exclusive 10-year service agreement with every mattress in a box purchase, underscoring our commitment to quality assurance and ongoing customer support.

Brand: Sleepmax


Size: King


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


Item Weight: 97 Pounds


Item Firmness Description: Extra Firm


Top Style: Euro Top


Cover Material: Cotton


Number of Layers: 7.0


Fill Material: Gel Memory Foam, High Density Foam, Memory Foam, Pocket Coils


Weight Limit: 2400 Pounds


Item Firmness Description: Extra Firm


Number of Layers: 7.0


Weight Capacity Maximum: 2400 Pounds


Additional Features: Extra Lumbar & Hip Support, Motion-Isolation, Pain Relief, Temperature Regulation, 365-Night Trial


Mattress Coil Type: Pocketed Coil


Construction Type: Hybrid


Number of Mattress Coils: 1120


Is Customizable?: No


Size: King


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


Item Weight: 97 Pounds


Item Thickness: 12 Inches


Item Dimensions: 80 x 76 x 12 inches


Item Depth: 12 inches


Cover Material: Cotton


Fill Material: Gel Memory Foam, High Density Foam, Memory Foam, Pocket Coils


Product Care Instructions: Lifetime Warranty


Mattress Comfort Layer Material: Gel Memory Foam, Memory foam


Material Type: Memory Foam


Brand Name: Sleepmax


Model Name: Sleepmax Mist


Product Benefits: Back Pain Relief, Improves Sleep, Posture Support, Pressure Relief, Reduces Toss & Turn


Model Number: Sleepmax Mist


Manufacturer: Sleepmax Direct


Set Name: 12'' Luxe


Manufacturer Part Number: Sleepmax Mist


Is Extendable: No


Unit Count: 1.0 Count


Included Components: Hybrid Mattress


top-style: Euro Top


Color: Grey


Style Name: Euro Top


Frequently asked questions

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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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Top Amazon Reviews

    • Perfect for side sleepers and leaves no back pain! Nice & firm! Perfect for side sleepers and leaves no back pain! Nice & firm!
Color: Grey Size: Queen Set name: 12'' Luxe
Review Image by Rachel Lutz
Review Image by Rachel Lutz
Review Image by Rachel Lutz
This mattress felt amazing last night! I'm a side sleeper and woke up with absolutely no back pain for the first time this morning and it's only been one night of use! It's the perfect width for me since I'm 300lbs and hubby is 200lbs. It's important to make sure your mattress is thick enough for your weight. It's not too plush and nice and firm so your legs don't sink in during activities as well. Over all, I'm very happy with my mattress purchase! The only thing is that you can kind of feel the springs inside if you push your hand down but that's to be expected with this type of mattress! It seems durable and the lifetime warranty is great. It's a perfect fit for my space. ... show more
Reviewed in the United States on May 31, 2026 Reviewed in the United States on May 31, 2026 by Rachel Lutz
    • Comfortable sleep!
Color: Grey Size: King Set name: 14'' Elite
Could not love this mattress more! It is extremely comfortable. I have back issues and my back hasn't hurt once! Doesn't take long to set up or to reach its full size and there was literally no odor. Great quality for the price! My only complaint would be the sides are a little softer than I like but the bed is so great, I'll take that one dislike! There is no transfer of motion, can't feel my husband tossing and turning! Highly recommend! ... show more
Reviewed in the United States on May 23, 2026 by Mandy
    • Great quality comfy mattress Great quality comfy mattress
Color: Grey Size: King Set name: 14'' Elite
Review Image by K.C. Building Supply
We bought this for our Air BnB. It’s super comfortable and we appreciated the affordable price. No odor, correct size, fast shipping. 10/10
Reviewed in the United States on June 6, 2026 Reviewed in the United States on June 6, 2026 by K.C. Building Supply
    • Extra firm great value Extra firm great value
Review Image by Regina Schmitz
Review Image by Regina Schmitz
The bed is extremely firm, which works for me but if you are hoping for a medium firmness might be a little too firm. I like the hybrid of coils and foam and the top of the matress is nice with quilting to keep the loft in place. My one down side is one corner of the bed is not aligned properly. At first I thought I needed to let it completely fill out from the packaging, but it is still wonky as seen in the pictures. The mattress arrived faster than expected. This is a heavy mattress, so get help opening it and placing it on the frame. Overall it was a great price and I do recommend the mattress. ... show more
Reviewed in the United States on October 26, 2025 Reviewed in the United States on October 26, 2025 by Regina Schmitz
    • WOW!
My husband and I have been sleeping on an all foam mattress the past 10 years. It was ok, but I started having many episodes of back pain this year. I was advised to get a firmer mattress. I found this one on Amazon and was skeptical to get it due to how affordable it is and it having springs but arrives rolled up. It arrived a day earlier than promised, but we waited to unroll it until Friday morning since we weren’t sure if we could sleep on it same day. It says it needs up to 72 hours to fully expand. This mattress was a heavy beast. With my back issues, hubby had to do the majority of the work. I was disappointed that when it was unrolled, the sleeping side was facing the floor, and the top/bottom were on the sides. We had to flip and rotate this large (king), heavy mattress. But that was the worst of the experience. We unrolled it at 5 am, and by the time we went to bed around 8:30, it seemed to be expanded enough so we decided to sleep on it. WOW! Best night’s sleep in a long time! Even better the second night! It was firmer than our foam mattress ended up before we got rid of it. But it was still soft enough that you don’t feel like you’re sleeping on a hard board. It has the right amount of support. I’m normally a side sleeper, but I have been sleeping a lot more on my back too because it has such good support! Any way I sleep, this has been comfortable and supportive. I love how tall the mattress is, and it seems to be made out of good materials. Obviously I can’t speak to the durability, and we’ll see how well the springs hold up, but so far I am so happy with this purchase. If you’ve been having back pain and/or need a new mattress, I highly recommend this one. My back pain has significantly improved to where I hardly have any after 2 nights on this mattress. I am so grateful I took a chance on this one. And I like that it was assembled in the USA. ... show more
Reviewed in the United States on November 16, 2025 by NVS
    • Great Mattress
Color: Grey Size: King Set name: 14'' Elite
Amazing mattress! Best nights sleep I’ve have had in a long time. Perfect firmness! I would highly recommend
Reviewed in the United States on May 23, 2026 by cwright
    • Not comfortable
Color: Grey Size: Queen Set name: 12'' Luxe
This mattress will leave a map of coils in your body. I’m keeping it because I have a secondary mattress on top and we are not sleeping on it but we tried. We allowed the three days to fully decompress.
Reviewed in the United States on June 7, 2026 by Sciencia
    • Best mattress ever
Color: Grey Size: King Set name: 14'' Elite
The mattress is perfect. It’s super comfy. The company has the best customer seevice
Reviewed in the United States on June 3, 2026 by Tiffany Ferguson

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