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Sleepmax Extra Firm King Size Mattress 12 Inch - Deep Sleep Hybrid Mattress Pressure Relief - Cooling Bed in a Box for Back & Side Sleepers - 365-Night Trial, Forever Warranty, Fiberglass-Free

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$359.99 Why this price?
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Availability: In Stock.
Fulfilled by Sleepmax USA

Arrives Sunday, Apr 26
Order within 22 hours and 44 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.

Brand: Sleepmax


Size: King


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


Item Weight: 114 Pounds


Item Firmness Description: Extra Firm


Top Style: Euro Top


Cover Material: Cotton


Number of Layers: 7


Fill Material: Memory Foam


Weight Limit: 2000 Pounds


Item Firmness Description: Extra Firm


Number of Layers: 7


Weight Capacity Maximum: 2000 Pounds


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


Mattress Coil Type: Pocketed Coil


Construction Type: Hybrid


Number of Mattress Coils: 1140


Is Customizable?: No


Size: King


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


Item Weight: 114 Pounds


Item Depth: 12 inches


Item Dimensions: 80 x 76 x 12 inches


top-style: Euro Top


Color: Grey


Style Name: Sleepmax Mist


Brand Name: Sleepmax


Age Range Description: Adult


Model Name: P2503173


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


Model Number: P2503173


Manufacturer: Sleepmax Direct


Item Type Name: Hybrid Mattress


Unit Count: 1.0 Count


Manufacturer Warranty Description: Lifetime warranty.


Cover Material: Cotton


Fill Material: Memory Foam


Product Care Instructions: Lifetime Warranty


Mattress Comfort Layer Material: Gel Memory Foam


Material Type: Memory Foam


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Apr 26

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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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews


  • Great value for the price
Color: Grey Size: King Set name: 14'' Ultra
Fast arrival. Firm but soft, did not smell (except for the smell when you break the wrapper but that’s expected), Heavy, ends are durable, exact size. I let it sit for 72 hours as recommended so it could form the shape correctly. Great sleep quality, sleeps better than the mattress I paid $1000 for.
Reviewed in the United States on April 9, 2026 by P8970

  • Quality product, comfortable
Color: Grey Size: Twin Set name: 10'' Premier
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

  • Sleepmax Colchón tamaño Full
Es un buen colchón o mattres full. Mi hija lo abrio lo coloco en encima de otro matress y tengo una base de madera. Y no espere nada y me acosté enseguida. Creo que ha sido una buena compra.👌
Reviewed in the United States on March 7, 2026 by Zaida D.

  • Super Comfort
Great product Great Price
Reviewed in the United States on January 28, 2026 by Ben H.

  • So worth the money.
Delivered on time. Absolutely wonderful! Looking forward to buying another one for all my beds.
Reviewed in the United States on December 23, 2025 by Marlene

  • Memory foam topper
So comfortable. Slept like a baby.
Reviewed in the United States on October 4, 2024 by Bobbie Shull

  • Bed top cushion
I like the memory foam cushion. It is very comfortable for my back.
Reviewed in the United States on September 8, 2023 by Stretch

  • Extra firm mattress
I got this for my daughter who loves firm mattresses - and she LOVES it. She kept stressing to me that you've got to love a firm mattress to love this. It has a little bit of a pillow top but it's enough to make it comfortable - it doesn't take away from it's firmness. It's not like you're laying on a board, it's just very firm. I expect this to last a very long long time. It's a great mattress for a couple (who likes firm mattresses) because when one person moves, it doesn't cause any movement on the rest of the bed. I'm always hesitant of mattresses that come rolled up but the last few that I've bought that way have been excellent - it doesn't take away from the quality or integrity of the mattress. Once opening it, you have to let it sit for 48-72 hours. I cannot tell you how impressed I am with this mattress. It's $300 and worth every bit of it. It seems incredibly high quality - you are getting more than what you're paying for. I recommend HIGHLY! ... show more
Reviewed in the United States on May 22, 2025 by peters-sweetie

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