Great firm mattress

Very supportive

Just unwrapped it.

Firm and supportive

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.

Seems to stay indented where I sleep. Didn’t think I would have that with such an expensive mattress. But seems to be comfortable.

Not too firm, not too soft, just right! In love with my new mattress. Highly recommend. It makes a difference!

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

Very supportive

[This review was collected as part of a promotion.] I was so excited to receive this mattress! This is the most comfortable bed that I have slept on. Everything from the cooling technology to the perfect balance of firmness to plush. I’ve never had any discomfort from sleeping and I am a side sleeper. I would recommend this mattress to anyone in the market for something new that has great cooling technology and molds perfectly to make a great nights sleep!