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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 21-30 of 249 reviews
Jun 28, 2026
Danielle J
5 out of 5 stars
5 out of 5 stars review

Raymour

Bought mattress in Watertown Ny from Raymour and it feels amazing, firm just like we like it

Review from Serta
Helpful?1L02F9H4SZMK15258655880
Jul 10, 2026
Noel E
5 out of 5 stars
5 out of 5 stars review

Comfy

Love the support and the foam is caressing!

Review from Serta
Helpful?1L02F9H4SZMK15258655880
Dec 25, 2025
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?1L02F9H4SZMK15258655880
Jan 10, 2026
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?1L02F9H4SZMK15258655880
Mar 21, 2026
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
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Apr 2, 2026
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
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Feb 25, 2026
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?1L02F9H4SZMK15258655880
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
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Jan 1, 2025
CaseyAZ
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Supportive mattresse

Have been sleeping on the mattress for about 3 weeks. Me and my partner like different firmnesses. I am a side sleepersnd they are side and back sleeper. We got the medium firm with a pillow top and it comfortable for both of us. JE

Review from Serta
Helpful?1L02F9H4SZMK15258655880
Oct 31, 2025
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?1L02F9H4SZMK15258655880