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Customer reviews for Serta Perfect Sleeper X Knox Hybrid Mattress for
Serta Perfect Sleeper X Knox Hybrid Mattress
4.7 out of 5 stars
stars
249 ratings249 reviews
  1. 5 stars79% (197)
  2. 4 stars15% (38)
  3. 3 stars3% (7)
  4. 2 stars1% (2)
  5. 1 star2% (5)

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Showing 31-40 of 249 reviews
Aug 28, 2025
BETHS
5 out of 5 stars
5 out of 5 stars review

Perfect blend of support and comfort.

I’m a side sleeper and was looking for a firm mattress that would not make the pressure points in my shoulder and hips hurt. This hybrid mattress has been perfect for me!

Review from ashleyfurniture
Helpful?1L02F9H4SZMK15231853527
Sep 18, 2025
Ronald W
5 out of 5 stars
5 out of 5 stars review

Straight No Chaser, Comfort Sleep!!

This mattress is, “da’ bomb!” Folks, if you think I’m fibbin’, get one! It seems to re-align sleeping posture, I miss work, on purpose to stay on this mattress! I removed the bedding to get model number for warranty- 10 years limited.

Review from Serta
Helpful?1L02F9H4SZMK15231853527
Apr 28, 2026
Shannon C
4 out of 5 stars
4 out of 5 stars review

New firmness

Firm & supportive where I need it and still comfortable enough to sleep on my side..

Review from Serta
Helpful?1L02F9H4SZMK15231853527
Apr 19, 2026
Robert F
4 out of 5 stars
4 out of 5 stars review

Not light

So far seems cool im older and had to have help to move it

Review from Serta
Helpful?1L02F9H4SZMK15231853527
Apr 16, 2026
Joseph B
5 out of 5 stars
5 out of 5 stars review

First Night Restful

I typically take days to adjust to a new mattress. The first night was very relaxing.

Review from Serta
Helpful?1L02F9H4SZMK15231853527
May 19, 2026
Anne R
5 out of 5 stars
5 out of 5 stars review

New Comfy Mattress

Love it! It is so comforting and relaxing…with lots of support!

Review from Serta
Helpful?1L02F9H4SZMK15231853527
Apr 27, 2026
Arturo R
5 out of 5 stars
5 out of 5 stars review

comfortable

excellent mattress very comfortable firm and soft

Review from Serta
Helpful?1L02F9H4SZMK15231853527
May 21, 2026
Kari C
5 out of 5 stars
5 out of 5 stars review

Comfy

Mattress is comfy and supportive. If you like a firm mattress - this is the one for you.

Review from Serta
Helpful?1L02F9H4SZMK15231853527
Apr 14, 2026
Bill H
5 out of 5 stars
5 out of 5 stars review

Knox firm

A few days in. So far so good. Needed firm mattress. Waking up without pain

Review from Serta
Helpful?1L02F9H4SZMK15231853527
May 28, 2026
Kim S
5 out of 5 stars
5 out of 5 stars review

Supportive

Comfy and makes a pretty bed

Review from Serta
Helpful?1L02F9H4SZMK15231853527