5 Inch King Mattress Medium Firm Gel Memory Foam - Cooling Support

In this review of the 5 inch King mattress, the bottom line is simple: it suits sleepers who want a compact, supportive memory foam surface with cooling properties and easy care. The mattress delivers targeted pressure relief through its gel-infused memory foam layer while a dense base provides stability, making it a good pick for guest rooms, RVs, or anyone needing a thinner, transportable mattress. Its washable removable cover and CertiPUR-US certification are practical advantages that make maintenance and safety straightforward.

Key Features

• Ventilated gel foam: The gel-infused memory foam is ventilated to help regulate temperature and promote airflow so sleepers stay cooler over several hours of rest.
• All-position support: The medium-firm feel balances cushioning and support to accommodate back, side, and stomach sleepers with reasonable spinal alignment.
• Dual-layer construction: A 1 in memory foam comfort layer over a 4 in high-density support core provides contouring on top with a stable base underneath.
• Pressure relief: Body-contouring memory foam cushions shoulders and hips to reduce pressure points and limit tossing and turning through the night.
• Removable washable cover: The soft breathable cover unzips for machine washing, keeping the surface fresh and hygienic with minimal effort.
• Mattress in a box: The compressed mattress ships compact and expands to usable shape within 72 hours for quick setup.

Who It's For

The mattress is best for people who need a thinner, portable mattress with comfortable memory foam contouring and cooling features, such as those furnishing a guest bedroom, studio apartment, or recreational vehicle. It also fits buyers prioritizing easy maintenance and CertiPUR-US certified foams for a safer sleep environment.

Shoppers who prefer a thick, plush pillow-top or those who require strong edge support and deep body sink should look elsewhere; the 5 in total thickness limits deep compression and may feel firmer to some heavier sleepers. Also, customers sensitive to initial off-gassing should allow time for airing, as experiences with smell vary.

Pros & Cons

Pros

• Comfortable pressure relief from the gel memory foam layer that helps reduce shoulder and hip discomfort.
• Cooling ventilated foam improves airflow compared with older solid memory foams.
• Removable, machine-washable cover simplifies cleaning and extends fresh use.
• Compact mattress-in-a-box design makes delivery and setup easy.

Cons

• At 5 in thick, the mattress provides limited deep support and may feel too firm for some who expect a plush surface.
• Some customers report variable initial smell and occasional sizing issues on delivery, so inspect immediately on unboxing.

Specifications

Our Verdict

The FDW 5 in King gel memory foam mattress is a practical value choice for anyone needing a compact, cooling, medium-firm sleep surface with easy maintenance. It delivers reliable pressure relief and a stable support core at a modest thickness, making it especially good for guest rooms or limited-space setups, though those wanting a plush, deep cushion should consider thicker models.

Frequently Asked Questions

How long until the mattress fully expands?
The mattress typically expands to usable shape within 72 hours after unboxing, though initial softening may continue over the first few days.

Is the cover washable?
Yes, the soft breathable cover unzips and is machine-washable for easy cleaning and maintenance.

Is the foam certified safe?
Yes, the mattress uses CertiPUR-US certified foams made without harmful chemicals, heavy metals, or ozone depleters.