14 Inch California King Mattress, Cooling Memory Foam Mattress in a Box, California King Size Mattress for Pressure Relief and Cool Sleep, Medium Plush, CertiPUR-US Certified
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Availability:
In Stock.
Arrives
Thursday, Jul 23
Item Firmness Description: Medium Plush
Item Thickness: 14 Inches
Size: California King
Features
- 3-Stage Heat Dissipation: Our TriCool Tech combines a breathable TENCEL cover, cooling gel memory foam and egg crate foam for better heat disperse, temperature regulation, and airflow increase. Our mattress features all the quality and durability to relieve pressure points for enhanced conforming comfort. This medium plush california king bed mattress is expertly engineered for sleepers who want a cooler and medium firmness feel.
- Cool, Restful Sleep: Built-in with temperature-regulating cooling gel, this california king size mattress actively draws heat away from your body throughout the night. TENCEL fibers move moisture better than common fabrics and absorb heat for refreshing comfort that helps you relax, while the egg crate structure creates dedicated 3D airflow channels that actively circulate airworking together to prevent heat buildup and sweat accumulation for scientifically cooler sleep.
- Effortless Pressure Relief: The Cooling Aerofushion Foam adapts perfectly to your body to help relieve pressure points and improve your overall comfort level. The egg crate surface of Natural Comfort Foam cradles high-pressure areas like shoulders and hips more effectively, paired with the spinal alignment maintained by the BraceSleeper Support Foam, reducing pressure points for sore backs.
- Brand You Can Rely on: All components of this california king mattress, from CertiPUR-US Certified memory foam, proudly made in USA, to Oeko-Tex Standard 100 Certified Fabric, are rigorously tested to provid a Child-Safe & Chemical-Free sleeping environment. We believe everyone deserves a better night's sleepwhatever their body type, sleep position, or budget.
- Worry-Free 10-year Limited Warranty: Our mattresses are engineered to exceed industry standards and stand the test of time. A 10-year limited warranty is included, offering peace of mind and efficient assistance when required. Please note that our mattresses cannot be returned once opened.
Description
14 Inch California King Medium Plush Memory Foam Mattress for Cool Sleep and Pressure Relief
Brand: NAPSIE
Size: California King
Product Dimensions: 84"L x 72"W x 14"Th
Item Weight: 96 Pounds
Item Firmness Description: Medium Plush
Top Style: Tight Top
Cover Material: TENCEL
Number of Layers: 4
Fill Material: Gel Memory Foam, High Density Foam, Memory Foam
Special Feature: Breathable, Fire Retardant, Low Motion Transfer, Pressure Relief, Temperature Regulating
Item Firmness Description: Medium Plush
Number of Layers: 4
Additional Features: Breathable, Fire Retardant, Low Motion Transfer, Pressure Relief, Temperature Regulating
Construction Type: Memory Foam
Size: California King
Item Dimensions L x W x Thickness: 84"L x 72"W x 14"Th
Item Weight: 96 Pounds
Item Thickness: 14 Inches
Item Dimensions: 84 x 72 x 14 inches
Item Depth: 14 inches
Cover Material: TENCEL
Fill Material: Gel Memory Foam, High Density Foam, Memory Foam
Product Care Instructions: Hand Wash Only
Mattress Comfort Layer Material: Gel Memory Foam, Memory foam
Material Type: Foam
Brand Name: NAPSIE
Model Name: NP-MD-14CK
Product Benefits: Back Pain Relief, Improves Sleep, Posture Support, Pressure Relief, Reduces Toss & Turn
Model Number: MNP140CK0MDT
UPC: 199581066243
Manufacturer: NAPSIE
Set Name: California King
Manufacturer Part Number: NAPSIE-MD-14CK
Included Components: Polyester, TENCEL, PUR foam
Item Type Name: Bed Mattress Conventional
top-style: Tight Top
Color: White & Grey
Style Name: 14 inch
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Jul 23
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Item Firmness Description: Medium Plush
Item Thickness: 14 Inches
Size: King
I’ve been sleeping on this 14-inch king size memory foam mattress for a few weeks now, and overall, I’m really impressed with the quality and comfort it offers. First, the medium plush feel is a great balance—not too soft, not too firm. It provides excellent support for my back while still contouring nicely to my body. I’ve noticed a significant reduction in my back pain since switching to this mattress, especially in the lower back area. The cooling Tencel cover is another standout feature. I tend to sleep hot, but this mattress does a great job of regulating temperature throughout the night. It feels breathable and cool to the touch, which makes a noticeable difference in sleep quality. Setup was quick and easy. It expanded nicely within a few hours after unboxing, with minimal odor that dissipated بسرعة. The motion isolation is also excellent—my partner’s movements barely disturb my sleep. I also appreciate that it’s CertiPUR-US certified and made in the USA, which gives me extra confidence in the materials and safety. Overall, this mattress delivers on comfort, support, and cooling. If you’re looking for a king size memory foam mattress that helps with back pain and keeps you cool at night, this is definitely worth considering
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Reviewed in the United States on April 1, 2026 by Young
Item Firmness Description: Medium Plush
Item Thickness: 14 Inches
Size: King
**The Ultimate Balance of Cool and Comfort!** Switching to this 14-inch king mattress has completely transformed my sleep. It arrives tightly compressed in a box, but it expands quickly and has zero harsh chemical smells, thanks to the CertiPUR-US certification. The medium-plush feel hits the absolute sweet spot. It provides incredible pressure relief for your shoulders and hips, contouring perfectly to your body without making you feel trapped in the foam. What really sets it apart, though, is the cooling memory foam. If you’re a hot sleeper who constantly flips the pillow, this mattress manages heat beautifully, keeping you at a comfortable, steady temperature all night long. It feels like a high-end luxury mattress at a fraction of the cost. I’m waking up refreshed and completely ache-free. Five stars!
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Reviewed in the United States on June 16, 2026 by SenseiString2
Item Firmness Description: Medium Plush
Item Thickness: 12 Inches
Size: Full
I am honestly blown away by the NAPSIE 12-inch Memory Foam Mattress. From the moment I opened the box, I could tell this was going to be a high-quality mattress. It expanded quickly, had zero chemical smell, and felt incredibly plush right away. Sleeping on it has been a dream—literally. The memory foam contours perfectly to my body without feeling too soft, and I wake up with no pressure-point pain. The cooling feature is real too; I don’t overheat at night anymore, which has always been a problem for me with other foam mattresses. The medium-plush feel is the perfect balance of comfort and support. I fall asleep faster and stay asleep longer. It’s honestly such a noticeable upgrade from my previous mattress. The fact that it’s CertiPUR-US certified just adds even more peace of mind. For the quality, comfort, and price, this mattress is absolutely worth it. I’d recommend it to anyone looking for a supportive and cool night’s sleep.
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Reviewed in the United States on December 9, 2025 Reviewed in the United States on December 9, 2025 by Kate
Item Firmness Description: Medium Plush
Item Thickness: 12 Inches
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Nice quality mattress
Reviewed in the United States on April 21, 2026 by Otis Common
Item Firmness Description: Medium Plush
Item Thickness: 14 Inches
Size: Queen
This mattress has a really comfortable medium-plush feel that balances softness and support well. It cushions pressure points nicely while still giving enough support for the bac, should and hips. The height was surprisingly good and I didn’t even need bed frame! The packaging was easy to move and very well wrapped in plastic. The cooling cover also helps reduce heat buildup, making sleep more comfortable through the night. The mattress expanded fully within a few minutes and had very little odor after unpacking. Motion isolation is also pretty good, so movement on one side doesn’t disturb the other much. For the price, the quality feels impressive, and it’s a great choice if you want a supportive memory foam mattress without spending luxury mattress money.
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Reviewed in the United States on May 23, 2026 Reviewed in the United States on May 23, 2026 by Chini P
Item Firmness Description: Medium Plush
Item Thickness: 14 Inches
Size: Queen
I have been using it for weeks. I like that the cover is washable and dries very well tho I will not wash it unless I have to. 14 inch is quite thick and high on my bed frame. I bought a medium firmness. I usually prefer firm mattress with10 inches. I’m really happy with this queen memory foam mattress. It came as a mattress in a box, expanded well, and was easy to set up. This 14 inch queen mattress looks and feels solid, and the queen size mattress provides great comfort and support. The medium plus firmness is not too hard and not too soft. It sinks in a little when you sit on it, but still feels supportive. It bounces back soon.
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Reviewed in the United States on June 1, 2026 Reviewed in the United States on June 1, 2026 by Elena
Item Firmness Description: Medium Plush
Item Thickness: 14 Inches
Size: Queen
I been really happy with this mattress. It’s very comfortable, supportive, and has been great for my many back issues. I sleep better and wake up with less stiffness and discomfort overall. It feels like a quality mattress without the high price, and it was very easy to set up arrived compact. Great value I will definitely recommend to family and friends.
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Reviewed in the United States on June 21, 2026 Reviewed in the United States on June 21, 2026 by Jose Gomes
Item Firmness Description: Medium Plush
Item Thickness: 12 Inches
Size: Full
Just what I needed, very comfortable. The cut of the foam layers on one side were not smooth and even, but for the price, I'm satisfied.
Reviewed in the United States on April 2, 2026 by Nancy C.