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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
Mar 21, 2026
Reviewer name: Cari T
4 out of 5 stars
4 out of 5 stars review

Perfect Sleeper

This mattress will be “perfect” as soon as my back adjusts to the firmness. I do like the comfiness of the top layer and the mattress is supportive.

Review from Serta
Helpful?1L02F9H4SZMK15215474487
Feb 25, 2026
Reviewer name: Allan C
5 out of 5 stars
5 out of 5 stars review

Great support and comfort for us side sleepers

So far our decision to replace our old Serta Icomfort Applause II was a good one. Very supportive, and provides a better night’s sleep.

Review from Serta
Helpful?1L02F9H4SZMK15215474487
Dec 25, 2025
Reviewer name: Gloria S
5 out of 5 stars
5 out of 5 stars review

serta perfect sleeper x Knox 13.5

The mattress is super firm and comfortable. I am happy. I recommend for people who have joint bone problems and especially the back

Review from Serta
Helpful?1L02F9H4SZMK15215474487
Apr 2, 2026
Reviewer name: Jill M
5 out of 5 stars
5 out of 5 stars review

Best Mattress Ever!

Firm, but not too firm, felt supported and blissful from the very first night...best sleep I've had in months!

Review from Serta
Helpful?1L02F9H4SZMK15215474487
Jan 10, 2026
Reviewer name: Henry D
5 out of 5 stars
5 out of 5 stars review

So far only 2 nights in

So far so good. Went from queen to king. Plenty of room now for the 2 of us. Seems to be doing it's job.

Review from Serta
Helpful?1L02F9H4SZMK15215474487
Nov 1, 2025
Reviewer name: Kathleen M
5 out of 5 stars
5 out of 5 stars review

New firm mattress

My rest test told me I needed more lumbar support with my arthritis. Been 12 years since we had a new mattress. It was time. Very tall though so have deep pocket sheets on hand. Glad I have bed steps.

Review from Serta
Helpful?1L02F9H4SZMK15215474487
Aug 28, 2025
Reviewer name: 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?1L02F9H4SZMK15215474487
Sep 18, 2025
Reviewer name: 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?1L02F9H4SZMK15215474487
Oct 31, 2025
Reviewer name: Valerie M
5 out of 5 stars
5 out of 5 stars review

Best mattress ever!

Comfy, supportive, firm edges. I returned a Casper mattress and got this Perfect Sleeper X. Back pain gone after first night and I sleep through the entire night now!

Review from Serta
Helpful?1L02F9H4SZMK15215474487
Apr 19, 2026
Reviewer name: 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?1L02F9H4SZMK15215474487