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SLEEP100

Deep Sleep 5-Zone Firm Mattress with Extra Lumbar & Shoulder Support - Fiberglass Free - 365 Night Trial - No Odor (12 Inch, King, Firm-New Version)

  • Based on 664 reviews
Condition: New
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$260.98 Why this price?
Save $79.01 was $339.99

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As low as $43.50 / mo
  • – 6-month term
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Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

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90-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

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Availability: Unavailable
Fulfilled by SLEEP100 SYNERGY LIMITED
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Size: King


Style: 12 Inch


Pattern Name: Firm-New Version


Features

  • 365-NIGHT HOME TRIAL - Worried our mattress might not meet your expectations? No need! We offer an industry-leading 365-day trial, giving you ample time to experience it fully. If you have questions, our dedicated customer support team is here to assist, try it risk-free for a full year.
  • ENHANCED SHOULDER & LUMBAR SUPPORT: with a unique zoned design, providing targeted relief for the shoulders and lower back. it's perfect for those with discomfort in these areas.
  • NO SMELL & FIBERGLASS FREE: Enjoy a hypoallergenic sleep environment, free from offensive odors. Rest easy knowing your mattress is safe and healthy for a peaceful night's sleep.
  • A GREAT MATTRESS OPTION FOR UNDER $1000: From top to bottom, inside and out, we use only safe and top-tier materials for your comfort and health. this mattress offers premium comfort and support, making it an outstanding value for quality and restful sleep.
  • FOREVER WARRANTY - Enjoy peace of mind with our industry-leading, lifetime warranty. As long as you own the mattress, its fully covered. We proudly stand behind our product quality, ensuring lasting comfort and support for years to come.

Brand: SLEEP100


Size: King


Product Dimensions: 20"L x 20"W x 20"Th


Item Weight: 20 Pounds


Item Firmness Description: Extra Firm


Top Style: Euro Top


Cover Material: Fabric with Cooling Properties


Fill Material: Memory Foam


Special Feature: Extra Lumbar & Shoulder Support, Firm, Pain Relief, Edge support, Side Handles for Easy Movement


Color: White


Item Firmness Description: Extra Firm


Additional Features: Extra Lumbar & Shoulder Support, Firm, Pain Relief, Edge support, Side Handles for Easy Movement


Construction Type: Hybrid


Size: King


Item Dimensions L x W x Thickness: 20"L x 20"W x 20"Th


Item Weight: 20 Pounds


Item Depth: 12 inches


Item Dimensions: 20 x 20 x 20 inches


Cover Material: Fabric with Cooling Properties


Fill Material: Memory Foam


Material Type: pocket spring coils


Brand Name: SLEEP100


Model Name: P2403332


Model Number: P2403332


Manufacturer: SLEEP100


Included Components: 1


top-style: Euro Top


Color: White


Style Name: 12 Inch


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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Great Value
Firm, comfortable, and immediately after first sleep helped with back pain. Quality and ease of set-up was great. This is a great value for the cost.
Reviewed in the United States on March 16, 2026 by Lelica Franklin
    • Great for Stomach Sleepers
Get it! I spent weeks searching Amazon mattresses and was super nervous to buy one. Because if you want cheap, you usually get cheap. Took a chance on this one based off of reviews (even though others have thousands and thousands) and so glad I did! It is the firmest mattress I've ever felt, so be prepared if that's what you're looking for. You hardly sink in at all. And that's what I wanted because I sleep on my stomach. Memory foam makes my hips sink in and hurts my bad so bad. I've now slept on this mattress for 2 weeks and I don't hurt at all. It's a miracle and I couldn't be happier. Will definitely buy again. I would say I agree with the other reviews about it being smaller than a standard queen. I did notice when we put it on our frame we now have a about 2 inch gap. But we weren't too picky and the mattress still fits myself, my husband, our toddler and a house full of cats lol ... show more
Reviewed in the United States on March 25, 2026 by Sarah S.
    • Surprised at the quality
Took a chance on buying a mattress online. I had never bought one before. I let it inflate for 3 days before using it and it’s super firm (just like I wanted). Very easy to unpack. I got the 14 inch version I could have room for a 1.5 inch topper. I’d definitely buy this again.
Reviewed in the United States on March 18, 2026 by Matthew
    • Firm and Comfortable
Review Image by Yasmin
The media could not be loaded. Leaving one star because of how the stitching was when we opened it. Looks like they stitched over the cotton. But definitely looks poorly stitched. Will update if they reach out with support. Update: I reached out to the seller regarding the mattress. They responded very quickly and offered a partial refund of the amount. Their customer service was very understanding and communicative. The bed overall, feels good. It is really firm and thick. I ended up getting a topper just to help with the cotton sticking out and prevent the mattress from tearing. But with the topper, it still feels firm and comfortable. Honestly the only issue how it was stitched and packaged. I really like the firmness of the mattress and would definitely recommend for those seeking a really firm mattress. I really hope they do up their quality on stitching, but for the price it's definitely worth a buy. ... show more
Reviewed in the United States on August 15, 2025 by Yasmin
    • Nice firm mattress
I was overwhelmingly satisfied by this mattress. My wife and I had been complaining about needing a firm mattress for a while and this definitely does the job. It feels like a nice hotel-grade mattress and seems pretty durable. Still brand-new but 10/10 right now.
Reviewed in the United States on March 5, 2026 by Natasha Gumbs Barlow
    • Affordable, Stylish, and Amazingly Firm Mattress
I am honestly impressed with this mattress! I usually buy very expensive ones, but this one exceeded all my expectations. It’s firm in the perfect way — exactly what I need for my back issues — and incredibly comfortable. The design looks stylish, the height is great, and the price is unbelievable for the quality. I sleep so well on it. Highly recommend! ... show more
Reviewed in the United States on November 21, 2025 by Amazon Customer
    • Not impressed..
Size: King Style: 12 Inch Pattern Name: Firm-New Version
Review Image by Sadie
Came with a huge deformity in the mattress and it was not as firm as it stated. Reached out to them and they argued with me for days trying to get me to not get a full refund even though they say they have lifetime warranty. Offered me 30% and then offered me 50% and said to buy I mattress topper. I said absolutely not, I’ve not even had it for 3 days, used it once and it was horrible.. I want all my money back.. they finally gave it to me but I would not purchase from them. There’s a lot of good reviews on here about them but if you read the negative ones it’s exactly the experience I had.. and I was just biased to the good ones. ... show more
Reviewed in the United States on March 19, 2026 by Sadie
    • Best matress ever
This is the best matress I have ever purchased i suffer from back problems ans since I got the matress my back is like brand new bought my son ,my mom,my mother in law ,my aunt and myself invest this matress its worth it
Reviewed in the United States on March 26, 2026 by Marisol Crespo

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