14 Inch King Size Mattress – The Feel Most Sleepers Prefer | Hybrid Gel Memory Foam Comfort & Balanced Support for Back and Side Sleepers – Medium-Firm, 365-Night Trial
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Extended holiday returns
Returnable until Jan 31, 2026 Learn more
Returnable until Jan 31, 2026 Learn more
This item's return window has been extended for the holiday season: Returnable until Jan 31, 2026
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.
View our full returns policy here.
Availability:
In Stock.
Arrives
Dec 5 – Dec 6
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Item Thickness: 14 Inches
Size: King
Features
- 365-NIGHT HOME TRIAL Not sure if its the right fit? Take your time. With our industry-leading 365-night home trial, you can sleep on it for a full year completely risk-free. Questions or concerns? Our friendly customer support team is always here to help.
- THE FEEL SLEEPERS LOVE:Medium-firm feel that blends pressure-relieving foam with responsive coils to support every sleep position.ur tester noted the balance was spot-on soft enough for side sleepers to sink comfortably, yet firm enough to keep the spine aligned for back sleepers.
- Zoned Hybrid Support System:Individually wrapped coils offer targeted lumbar reinforcement while adaptive foam cushions shoulders and hips.When testing, our reviewer felt uplifted through the midsection without the stiffness common in all-foam beds a better balance between contour and stability.
- SOFT YET SUPPORTIVETHE PERFECT FEEL SLEEPERS LOVE:It all starts with the KOULABR Z High-Compression Spring Systemshorter coils for stronger support and a thicker, more contouring comfort layer. The 8.5 high-compression pocketed coils reinforce the edges and isolate movement, ensuring balanced comfort in this hybrid mattress.
- Reinforced Edge Support & Practical Design:Upgraded pocket coils work with high-density foam encasement to strengthen the perimeter. During testing, our reviewer noticed steady support even when lying near the edge no slipping or sagging, just a stable surface that stays firm night after night.
- CertiPUR-US WORRY-FREE WARRANTY:All memory foam is CertiPUR-US certified and tested, and we offer a 10-year warranty. We recommend allowing your new mattress to fully expand within 72 hours. Keep a safe distance when unboxing, as the queen mattress may expand rapidly and pose a risk. For any assistance or issues, please contact our customer support team.
Brand: KOULABR Z
Size: King
Product Dimensions: 80"L x 76"W x 14"Th
Top Style: Euro Top
Cover Material: Cotton Blend
Number of Layers: 5.0
Fill Material: High Density Foam, Memory Foam
Special Feature: Back Pain Relief, Maximum Support, Promote spinal alignment, Zone Support
Color: Grey
Coil Type: Pocketed Coil
Product Dimensions: 80 x 76 x 14 inches
Item Weight: 76 pounds
Manufacturer: KOULABR Z
Item model number: CD01B-14k
Date First Available: July 22, 2025
Age Range Description: Adult
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Dec 5 – Dec 6
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Learn more about financing & leasing here.
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Item Thickness: 10 Inches
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I am extremely impressed with this mattress! From the very first night, I noticed a huge difference in the quality of my sleep. The mattress has the perfect balance between softness and support — it gently contours to the body while still keeping the back properly aligned. I no longer wake up with aches or stiffness, which has been a big relief. The motion isolation is excellent too. Even when shifting positions during the night, the mattress stays stable and quiet. The top layer feels plush and luxurious, and the overall build quality is outstanding. You can tell it’s made with durable materials designed to last. Another thing I love is how cool it sleeps. The mattress doesn’t trap heat, and I stay comfortable all night long. It expanded quickly out of the box and had no strong odor at all, which is a big plus. Overall, this mattress exceeded my expectations in every way. If you’re looking for comfort, support, and great value, this is definitely the one to get. I’m extremely satisfied with my purchase and would absolutely buy it again!
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Reviewed in the United States on November 25, 2025 by Lianet
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I purchased this queen mattress a bit hesitantly, as I had never tried a hybrid memory foam mattress before. However, I noticed a significant difference from the very first night. The firmness is just right: soft enough to contour to my body, yet supportive enough for my back. Receiving the mattress in a box was very convenient, and it expanded to its full shape quickly after opening. The materials and finish feel high-quality and durable. I highly recommend this mattress to anyone seeking comfort, space, and excellent value.
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Reviewed in the United States on November 12, 2025 by Heiller Muñoz Heiller Muñoz
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Reviewed in the United States on November 17, 2025 by Kate Kate
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Medium firm leans more firm. In fairness, we were going from a king sized solid memory foam mattress that was 16-18 inches thick. We had it for 14 years it was very comfy but getting significant dips. Our daughter got this mattress and recommended it, she thought it was amazing, is not so much. It was painfully hard compared to the high dollar memory foam we were replacing. Our fix was to buy a viscosoft 4 inches thick high density foam mattress topper. We are loving this combination! We will just replace the topper when the foam gets worn down rather than the entire mattress! All in we are in at just over $500 bucks and it feels similar to the nearly 1800 mattress we replaced! I call that a win all day long!
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Reviewed in the United States on November 23, 2025 by Michelle r. Renn
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I’m really happy with this twin mattress! It arrived compressed in a box and expanded fully within a few hours with no strong smell. The hybrid design with pocket springs and memory foam gives the perfect balance of softness and support. It feels medium-firm, which is great for keeping my back comfortable and aligned. Motion isolation is excellent—no bouncing when someone moves. Overall, it feels high-quality and super comfortable for the price. Great mattress for kids, guests, or everyday use!
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Reviewed in the United States on November 4, 2025 by Haus & Hype Haus & Hype
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Reviewed in the United States on October 15, 2025 by Jimi Adams Jimi Adams
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This mattress surprised me with how comfortable it is from the first night. The firmness is just right and it doesn’t sink over time. You can feel the good quality in the materials and the padding. I sleep so well and wake up without back pain. I would definitely buy it again.
Reviewed in the United States on November 18, 2025 by Maria gonzalez Maria gonzalez