14 Inch Cal King Mattress in a Box - Copper Memory Foam Comfort

In this review the 14 Inch Cal King Mattress in a Box is presented as a strong option for sleepers who need steady support and pressure relief without overheating. The mattress combines a cooling graphene cover and a copper-infused memory foam layer to deliver a medium-firm feel that many buyers describe as supportive for back issues and comfortable across sleeping positions. Setup is straightforward since the mattress ships compressed in a box and expands within 24 hours, making it an easy choice for those who want a ready-to-use Cal King mattress delivered to the door.

Key Features

• Cooling Graphene Cover: The graphene knit fabric cover wicks heat and moisture to help maintain a comfortable sleep temperature all night.
• Advanced Memory Foam Layer: Copper-infused Aerofusion foam contours to the body for targeted pressure relief and reduced odor risk.
• Medium-Firm Support: The overall construction provides a balanced feel that supports spinal alignment and helps reduce morning back pain for many users.
• Effortless Setup: Compressed, rolled, and boxed delivery allows quick setup on box springs, slatted platforms, foundations, or the floor with full expansion in about 24 hours.
• Certifications: CertiPUR-US and Oeko-Tex Standard 100 testing ensures the foams and fabrics are free from harmful chemicals and VOCs.
• 10-Year Limited Warranty: Built materials and warranty support offer longer-term confidence in the mattress construction.

Who It's For

The mattress suits sleepers who prefer a medium-firm feel with reliable pressure relief, especially people with back pain or those who need consistent support across multiple sleeping positions. Cal King size and 14 in thickness make it a good pick for taller couples or individuals who want extra surface area and a substantial mattress profile.

It is less appropriate for buyers who want a very plush, pillow-top softness or those who require a traditional innerspring bounce; strictly spring-preference sleepers should look elsewhere. Also note opened mattresses are not returnable, so those who need a trial period should purchase with that policy in mind.

Pros & Cons

Pros

• Strong pressure relief from the copper-infused memory foam helps reduce morning discomfort.
• Cooling graphene cover improves temperature management for warm sleepers.
• Compatible with multiple bed frames and ships compressed for easy setup.
• CertiPUR-US and Oeko-Tex certifications back material safety and low VOCs.

Cons

• Durability reports are mixed, so long-term resilience may vary with use.
• Opened mattresses cannot be returned, limiting at-home trial flexibility.

Specifications

Size	Cal King 72in x 84in
Thickness	14 in
Comfort Level	Medium-firm
Cover Material	Graphene knit fabric, removable hidden zipper
Core Material	Copper-infused Aerofusion memory foam
Certifications	CertiPUR-US, Oeko-Tex Standard 100
Warranty	10-year limited warranty

Our Verdict

The 14 Inch Cal King mattress in a box is a practical choice for taller sleepers and people who need steady pressure relief with cooling performance. It balances support and contouring well and offers safety-minded certifications and a 10-year limited warranty, making it a solid value for those after a medium-firm memory foam mattress; cautious buyers should note the no-return policy after opening.

Frequently Asked Questions

How long does the mattress take to expand?
The mattress is compressed for shipping and typically takes about 24 hours to fully expand to its original shape.

Is the cover removable for cleaning?
Yes, the graphene knit cover has a hidden zipper and can be removed without flipping the mattress for easier cleaning.

Are the materials tested for harmful chemicals?
Yes, the foams and fabrics are CertiPUR-US and Oeko-Tex Standard 100 certified to ensure low VOCs and the absence of certain harmful substances.