12 Inch Gel-Infused Memory Foam Mattress King Size - Medium Soft

Our review of the 12 Inch Gel-Infused Memory Foam Mattress King Size finds it best for sleepers who want a balance of pressure relief and cooling without fuss. The single biggest reason to buy is the combination of cooling gel and adaptive memory foam layers that contour to the body while promoting breathability for warmer sleepers. It arrives compressed in a box for easy setup and carries a 10-year limited warranty, making it a practical choice for those seeking a low-hassle mattress with noticeable comfort and certified foam quality.

Key Features

• Cooling Gel & Green Tea Infusion: The mattress is infused with cooling gel and green tea extract to help reduce surface heat and impart a fresher sleep feel.
• Ergonomic Support: Multiple layers of adaptive memory foam contour to the body to encourage proper spinal alignment and targeted pressure relief.
• CertiPUR-US Certified Foam: The foam meets CertiPUR-US standards for content, emissions and durability, giving added confidence in long-term performance.
• Convenient Mattress in a Box: The compressed, rolled delivery makes setup simple; unpack and allow 48-72 hours for full expansion.
• Universal Frame Compatibility: Designed to fit on box springs, slatted bases and adjustable frames for flexible bedroom setups.

Who It's For

The mattress is well suited to couples and single adults who prefer a medium soft feel that still offers support; the memory foam layers provide cushioning for side sleepers while the base foam maintains spinal alignment. It is also a good match for warmer sleepers who appreciate the added cooling gel and breathable cover.

Shoppers who need an extremely firm surface, a hybrid coil construction, or those who require an immediate full loft on day one may want to consider alternatives; some users reported mixed results with how quickly the bed fully expands after unboxing.

Pros & Cons

Pros

• Comfortable medium soft profile that many reviewers called supportive and good value.
• Cooling gel and green tea infusion help surface breathability and a fresher sleep feel.
• CertiPUR-US certified foam with a 10-year limited warranty provides peace of mind about durability.
• Easy delivery and setup as a mattress in a box works for most homes and frames.

Cons

• Some customers reported mixed results with full expansion after unrolling, so allow the recommended 48-72 hours and check placement before sleeping.
• Size perceptions varied for a few buyers who expected a slightly different loft or firmness.

Specifications

Our Verdict

This 12 in gel-infused memory foam king mattress is a sensible buy for sleepers who want pressure-relieving contouring plus cooling at a modest price. The CertiPUR-US certification and 10-year limited warranty make it good value for those setting up a master or guest bedroom, though buyers should allow time for full expansion and match firmness expectations to their preferred sleep position.

Frequently Asked Questions

How long does the mattress take to fully expand?
Allow 48-72 hours after unrolling for the mattress to reach full loft and recover from compression.

Is the cover washable?
Yes, the mattress comes with a removable, washable cover for easy care.

Will this mattress fit an adjustable frame?
Yes, it is designed to be compatible with adjustable frames, slatted bases and box springs.