King Graphite Infused Memory Foam Mattress in a Box - Medium Firm

Our review of the LIFEMENT Basic King Graphite Infused Memory Foam Mattress in a Box finds it best for shoppers who want a compact, good-value sleep surface with balanced support. The single biggest reason to buy is the mattress's 3-layer comfort system that combines a cooling gel top, supportive middle foam, and a durable base to deliver pressure relief and steady spinal alignment. Setup is straightforward from the box and most users report fast, predictable expansion and a comfortable medium-firm feel that works for a wide range of sleepers.

Key Features

• 3-Layer Comfort System: Three premium foam layers cushion pressure points while promoting proper alignment for more restful sleep.
• Cooling Gel Memory Foam: The gel-infused top layer helps regulate temperature and contours to the body to reduce hot spots at night.
• All-Sleeper Support: A medium-firm feel balances softness and support so it is suitable for back, side, and stomach sleepers.
• Motion-Absorbing Design: Engineered to minimize movement transfer so partners tossing and turning are less likely to disturb each other.
• Boxed & Ready: Delivered compressed in a box for easy transport and expands fully within about 72 hours for convenience.
• CertiPUR-US & Fiberglass-Free: Made without formaldehyde, lead, phthalates, or fiberglass, making it a safer option for families and pets.

Who It's For

The mattress is a solid choice for budget-conscious shoppers who still want a structured, durable foam bed with cooling features and pressure relief. It suits couples who need motion isolation and individuals who prefer a medium-firm surface that supports back, side, or stomach sleeping positions.

Those who need a very plush or very firm mattress, or who prefer hybrid innerspring construction, should look elsewhere; heavy sleepers who require thicker edge support may also consider a thicker model than this 6 in option.

Pros & Cons

Pros

• Comfortable medium-firm feel that many customers find supportive and relieving for back pain.
• Cooling gel top layer helps reduce surface heat for a more comfortable night.
• Good value and quality appearance for the price, with easy setup from the boxed delivery.
• CertiPUR-US certified and fiberglass-free, making it safer for homes with children or pets.

Cons

• At 6 in overall thickness, it may feel thin for heavier sleepers or those who want deep contouring.
• Expansion can take up to 72 hours, so immediate full comfort may be delayed for some buyers.

Specifications

Brand	LIFEMENT
Size	King
Thickness	6 in
Feel	Medium-firm
Construction	3-layer foam with gel-infused memory foam top
Certifications	CertiPUR-US; Fiberglass-free
Packaging	Compressed in a box, expands up to 72 hours

Our Verdict

The LIFEMENT King graphite infused memory foam mattress offers balanced support, cooling, and reliable motion isolation at an attractive price, making it a smart buy for most sleepers who want a boxed foam mattress. It is especially good for couples and mixed-position sleepers looking for pressure relief and safer foam construction, though those wanting more thickness or a hybrid feel should consider alternatives.

Frequently Asked Questions

How long does the mattress take to expand?
Most units expand quickly but allow up to 72 hours for full expansion and to off-gas before regular use.

Is this mattress suitable for back pain?
Yes; customers report the medium-firm support and layered construction help with spinal alignment and reducing morning back discomfort.

Is the foam treated with harmful chemicals?
No; the mattress is CertiPUR-US certified and free from formaldehyde, lead, phthalates, and fiberglass.