These are the words of the wisest, smartest, and most beautiful person in the world: My Wife. Passes the wife test, passes my test.

The mattress already has divots or impressions from where we sleep in less than two weeks. We are not overweight.

I love the Serta Knox firm mattress! Even though it is firm, it is comfortable and I can sleep without any issues.

My sister seems to be comfortable and sleeps well through the night. No more saggy mattress she wakes up with a smile on her face.

The mattress is very firm, which I at first was unhappy about. However now, after several months, I am very glad I chose it.

Perfect Sleeper. We're able to sleep at night. Very satisfied with with our back problems. Problem satisfied, very firm comfortable.❤️👌

Mattress is plush and comfy. And a great fabric coloration.

Comfy and supportive - looking forward to many restful sleep nights.

Nice and firm. feels great to my back. Love the design and color.

Nice cooling down at night