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Sleepmax

Sleepmax Extra Firm King Mattress 12 Inch, Pain Relief Hybrid Mattress | Deep Sleep Bed in Box, For Back & Side Sleepers, 365-Night Trial & Forever Warranty, Fiberglass-Free, CertiPUR-US Certified

  • Based on 45 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Sleepmax USA
Arrives Aug 12 – Aug 14
Order within 18 hours and 32 minutes
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Color: Grey


Size: King


Set name: 12'' Luxe


Features

  • PAIN RELIEF & MOTION ISOLATION Combining the supportive benefits of coils with the softness of premium foam, Sleepmax Mist helps align the spine, evenly distributes body weight, and relieves pressure points for deep, restorative sleep. Individually wrapped springs isolate motion and minimize noise, ideal for light sleepers.
  • BALANCE OF COMFORT & SUPPORT With a deluxe Euro top, pressure-relieving foam layers, and a durable base reinforced with pocketed coils, Sleepmax Mist delivers a just right feel that suits back, side, and combination sleepers alike, offering both softness and stability.
  • NON-TOXIC MATERIALS & SKIN-FRIENDLY Sleepmax Mist is crafted using CertiPUR-US and OEKO-TEX Standard 100 certified materials, free from fiberglass and harmful substances. It complies with CFR1633 fire safety regulations, offering a clean, hypoallergenic surface thats gentle on skin.
  • ENHANCED SAFETY & EXTENDED LIFESPAN Built with sturdy edge support to prevent sagging and improve structure, Sleepmax Mist enhances safety by reducing the chance of roll-off during sleep. Reinforced edges also protect internal layers, contributing to longer-lasting performance.
  • ABOUT SLEEPMAX With over 40 years of sleep innovation, Sleepmax includes a lifetime service agreement with every mattress-in-a-box purchase, reflecting our commitment to reliable quality and long-term customer care.

Description

365-NIGHT TRIAL & LIFETIME SERVICE Sleepmax's commitment knows no bounds. • Tested Trust All products carry CertiPUR-US certification (free from ozone depleters/PBDEs), while OEKO-TEX Standard 100 fabrics ensure skin-safe materials. • Precision Production 132-point quality checks result in industry-leading defect rates below 0.8% across all product lines. At five production facilities worldwide, spanning 10 million square feet, we stand as a top three industry leader globally. Our raw materials undergo internal design and manufacturing, enabling efficient cost reduction and quality control. We have established a rigorous quality control system as the proprietor and producer of the brand. No stress. No discomfort. Just Sleepmax. Every mattress is accompanied by a 365-night trial, and each product we offer includes lifetime care. Dream on, Sleepmax has your back. Is this mattress suitable for side, back, and stomach sleepers? Yes. Sleepmax adapts to side, back, and stomach sleepers through uniquely balanced structural ratios. Its layered design distributes weight evenly to relieve shoulder and hip pressure, support spinal alignment, and keep hips lifted to prevent sagging How does the 365-night home trial work? Your 365-night trial begins when your order is placed. If any quality-related issue occurs within one year, simply let our support team know. We’ll assist you through the process and make sure you’re fully supported. Does this mattress help relieve back pain? Yes. Sleepmax helps relieve back pain by maintaining proper spinal alignment and preventing sagging. Its balanced structure distributes body weight evenly, reducing pressure buildup and supporting the back throughout the night. Will this mattress sag or lose support over time? Sleepmax is designed to resist sagging. Reinforced support layers and a stable internal structure help maintain consistent support across the surface, preventing soft spots and mid-section collapse over long-term use. Why doesn’t Sleepmax use zoned mattress design? Zoned mattresses assume fixed body positions based on standard body types. Sleepmax uses a balanced structural approach, allowing the surface to adapt to different body shapes and sleep positions without forcing alignment into preset zones. Sleepmax Mist Mattress Sleepmax OmniFit Mattress Sleepmax Podium Mattress Sleepmax OmniFit Mattress Sleepmax Podium Mattress Sleepmax OmniFit Mattress Sleepmax Podium Mattress

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


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


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


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 Depth: 12 inches


Item Dimensions: 80 x 76 x 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, Stress Relief


Model Number: Sleepmax Mist


Number of Items: 1


Mattress Type: Standard Mattress


Number of Packs: 1


Manufacturer: Sleepmax Direct


Unit Count: 1 Count


Included Components: Hybrid Mattress


Manufacturer Part Number: Sleepmax Mist


Set Name: 12'' Luxe


top-style: Euro Top


Color: Grey


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Aug 12 – Aug 14

Yes, absolutely! You may return this product for a full refund within 30 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

    • AMAZING customer service!!
Color: Grey Size: Full Set name: 12'' Luxe
Review Image by VettaBoo
Review Image by VettaBoo
I was so excited to get my bed, and when I inflated it, it was a king, when I ordered a full. I was so upset! I got in touch with customer service and they gave me a bunch of options. They decided to let me keep the king bed, which is going to my sister, and they sent me out the full bed for free. The bed is extremely comfortable, firm and exactly what I wanted. I officially have no more back pain. Shipping only took about 3 days! I would definitely order from them again. ... show more
Reviewed in the United States on July 24, 2026 by VettaBoo
    • Buy It
Color: Grey Size: Full Set name: 12'' Luxe
Recommend This Product
Reviewed in the United States on August 3, 2026 by Virgie
    • Very comfortable extra firm everything they say it did
Color: Grey Size: Queen Set name: 10'' Premier
I bought my bed like five days ago. It’s the most amazing bed I've ever had. Back pain is gone. Sleep like a baby. I would recommend this bed.
Reviewed in the United States on July 20, 2026 by indra
    • Firmeza con comodidad
Color: Grey Size: Full Set name: 10'' Premier
Después de buscar colchones en usa que no fueran un masmello y amaneciera con la espalda chueca decidí irme por un colchón firm, y este ha sido el mejor colochonlos 2 primeros día pensé que era demasiado duro pero ahora doy gracias todos los día por poder despertar sin dolor de espalda es la mezcla perfecta entre firmeza y comodidad ... show more
Reviewed in the United States on June 29, 2026 by Ana
    • Worth it
Love this best investment I ever made.very good materials and brand !!!! Love love love it!!!!
Reviewed in the United States on June 2, 2026 by Redheart
    • Quality product, comfortable
I’ve slept on it once. Good quality product, good firmness. I felt well supported through the night and slept well.
Reviewed in the United States on April 12, 2026 by G
    • Mattress Cover and Sheets are Somewhat Difficult w/o Deep Pockets
Review Image by Courtney
Review Image by Courtney
Review Image by Courtney
Review Image by Courtney
I received the Sleepmax Extra Firm 3 inch twin mattress topper for free, and after spending time with it, I can confidently say it delivers exactly what it promises and then some. If you are looking for serious support without sacrificing comfort, this topper hits a really nice balance. First, the construction and materials stand out right away. The fusion memory foam feels dense and supportive rather than soft and sinky, which is exactly what you want from an extra firm option. It does not collapse under weight or create that “stuck” feeling some memory foams have. Instead, it keeps your body aligned, which is especially noticeable in the lower back and hips. The infusion blend is a thoughtful mix. The gel helps regulate temperature, the bamboo charcoal adds a slightly dry and fresh feel, and the green tea and copper elements contribute to odor control and overall freshness. Whether or not you believe in every benefit of those infusions, the result is a topper that feels clean, breathable, and well engineered. One of the biggest surprises was how lightweight and manageable it is. For a 3 inch dense foam topper, I expected it to be awkward to move, but one person can easily unpack, position, and adjust it without a struggle. That makes setup simple and also practical if you ever need to rotate or reposition it. The cover is another strong point. It has a soft, slightly textured feel that adds to the overall comfort, and it fits snugly around the foam without bunching. It also helps the topper stay in place on the mattress, which is something a lot of toppers struggle with. The entire setup feels cohesive rather than like separate pieces layered together. In terms of performance, this topper is ideal if your mattress is too soft or starting to lose support. It noticeably firms up the sleeping surface while still offering enough contouring to relieve pressure points. Side sleepers may find it a bit firm depending on preference, but back and stomach sleepers will likely appreciate the added stability and alignment. It also does a solid job of minimizing motion transfer, which is great if you share a bed. Another major plus is the lack of odor. There is little to no off gassing right out of the packaging, which is not always the case with foam products. You can use it almost immediately without that typical chemical smell lingering in the room. Overall, this topper feels thoughtfully designed, well constructed, and highly functional. It is light enough to handle easily, firm enough to make a real difference, and made with materials that enhance both comfort and durability. If you want to upgrade your mattress without replacing it, especially if you need more support, this is an excellent choice. ... show more
Reviewed in the United States on April 30, 2026 by Courtney
    • Firm Queen 12 Inch Hybrid Starry Mattress
Review Image by Sarah
Review Image by Sarah
Review Image by Sarah
Review Image by Sarah
I ordered the Firm Eurotop Sleepmax Starry Mattress in the 12 inch thick Queen variation. It's true to size as described. It's a hybrid and fairly heavy so I needed another person to help me move it to my bedroom. Unboxing and setup was straightforward. The mattress expanded right away and was fully finished in about a day and a half. There was no offgassing smell at all which I appreciate, being so sensitive to odors. I also like that this is CertiPUR-US and OEKO-TEX certified, fiberglass free, and meets fire resistant standards. I'd say that this is a medium firm to firm mattress. It uses 965 pocketed coils and a memory foam top to deliver both support and pressure relief at the same time. The mattress has a bit of spring to it, but doesn't sag and it keeps my back straight and my spine well aligned. Motion transfer seems to be minimal. I'm about 5'11" 150 pounds for reference and not sure if it would be quite as supportive for someone twice my weight. The edge support isn't great at all. Also, you can feel the edges of the metal coils through the sides of the bed. I mostly sleep on my side and can almost feel coils through the top as well. It's not uncomfortable and they definitely aren't poking me, but not sure how that will be over time. If there was a little more padding on the top, it would add a lot to the comfort. It's more comfortable laying on my stomach and back, but some of that is because it's designed to be firm. I added a 3 inch memory foam topper and it's perfect. Now I have the sturdy support of this mattress and enough cushioning for my bony hips. I struggle with back and joint pain and so far this combination is really improving my comfort. This mattress doesn't sleep especially hot or cold. Skeepmax offers a 365 day sleep trial which offers a nice incentive to give it a try. They also advertise 10 years of customer support. When I ordered this mattress, it was $399.99. Now the coupon price is down to just half of that. For $199.99, this is an excellent value and definitely worth purchasing if you're looking for a firm mattress. ... show more
Reviewed in the United States on May 15, 2026 by Sarah

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