Best King Size Memory Foam Mattress
Best King Size Memory Foam Mattress

There’s no comfort quite like the kind you get from a big hug.

The Ultima Memory Foam Mattress delivers just that — enveloping comfort that fits your shape like a glove to soothe you to sleep.

It is created with a special blend of high-quality foam layers, and it features our famous green tea and charcoal-infused memory foam for a mattress that stays fresh and odor-free over time.

Zinus Ultima Comfort King Memory Foam Mattress 

An airflow-boosting layer of cradling comfort foam and a durable high-density foam base layer finish off this fine-tuned system of top quality foams, so your body’s curves are supported and allowed to rest naturally, leading to sounder sleep with no more aches and pains.

This skillfully crafted design arrives at your doorstep in one wondrous package and instantly begins to expand to its original glory once unboxed; it’s as simple as that!

Already loved and highly rated by thousands of happy customers, the Ultima mattress includes a 10-year worry-free warranty, so you can be sure that it will put both your body and mind at rest.

Green Tea-infused Memory Foam With a Soft, Poly Jacquard Cover


Wholesome and natural ingredients, like green tea and moisture-absorbing charcoal work, wonders in a mattress!

And we’ve designed this one to control odors, maintain freshness, and envelop your shape, so you awake restored and refreshed


2 inches conforming memory foam, 2 inches airflow-enhancing comfort foam, and 4 inches durable, high-density base support foam; ideal for stomach sleepers and average-weight sleepers


The highest quality foam is CertiPUR US Certified for durability, performance, and content.


Our technology allows this mattress to be efficiently compressed into one box that’s easily shipped and maneuvered into the bedroom; unbox, unroll, and this mattress does the rest, expanding to its original shape within 72 hours.

Worry-free 10-year limited warranty included; twin mattress supports a maximum weight of 250 lbs, while all other sizes can support up to 500 lbs.

Meet Our Memory Foam Mattresses

Our Memory Foam Mattresses conform to your coziest sleeping positions– flat on your back, rolled up in a ball, or spread out like a starfish with your face smooshed in a pillow.

Zinus Mattress