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Serta Perfect Sleeper X Knox Hybrid Mattress

Instant Savings

Free White Glove Delivery included for Plus Members. Set up and mattress haul away available for all.
Enjoy a 100-night in-home Trial backed by Serta, plus receive a $300 Sam’s Club eGift Card to use toward future purchases.
<ul>
<li>5 ZoneResponse Design combines coils and contouring memory foam for full body spinal alignment</li>
<li>Available as a Plush or Firm</li>
<li>Compatible with most bed frames, box springs, platforms and adjustable foundations</li>
<li>Available in Twin XL, Full, Queen, King, and Cal King</li>
</ul>

Amount

+5.5" Boxspring

+9" Boxspring

Mattress Only

Size

Twin-XL

Full

Queen

King

Cal-King

Style

Firm

Plush

We absolutely love our Serta mattress! At first, it felt a bit stiff, but after a few days of breaking it in, it became incredibly comfortable. We made the switch from our previous pillow top options because they kept breaking down too quickly, and we're so pleased with our decision. This mattress provides great support and feels much more durable. Overall, we couldn’t be happier with our purchase!

A Perfect Balance of Comfort and Support!

Serta

My first night sleeping on the mattress and it was night and day compared to my old mattress. I did not wake up in pain, specifically, low back pain. The difference after one night of sleep is profound. I pray this continues and does not change after a year. It seems that’s when mattresses sleep quality change.

So far so good!

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

Supportive mattresse

I waited to write my review. We've own our mattresses maybe a mo now and it's broken in to my liking perhaps not all the way though. Off hand it was a lil firmer than i would like. I got the plush and the other is the firm both in twin xl's. Ours is paired with an adjustable base in zero clearance status and king size bed. I have moments where i can't wait to get in bed. I thought with my ailments it would help a lil more but mine are mechanical. No matter what i choose the ailments will still be there. When i can sleep it's comfortable. I first tried this in the mattress store along with the kendall model which is just flat and more contouring because of the memory foam. However that model made it harder for me to get up although i loved everything else about it. I got a great deal with the sale price of $799 for each one plus $300 back in gc form which i received appox a wk or so after delivery. I knew what i was getting and didn't go in blind when purchasing. Although i use it with my base there are no dips or anything forming in the mattress. I wish it longevity of 12  yrs as my king koil mattress. It's worth the spend.

Get it

When the mattress arrived it was just great, no weird smell and looked exactly like the showroom model. It's very firm which helped my herniated disc. I work hard and I need to recharge at night, not toss and turn. It's perfect for me and I'm glad I chose this one. The design and color are also very attractive to the eye. One of the best features of my purchase was the mattress protector with cooling technology. It's in there! I slept well and could notice the difference in temperature immediately. I highly recommend.

Best Night Sleep Period.

i bought what was described as a plush mattress and I would not describe it as plush. i would call it medium firm to firm. the mattress is of high quality, imo, just the description does not match firmness of the mattress. i woke up to body aches, being a side sleeper. after giving the mattress a month, i finally added a 2 inch memory foam topper. now, i sleep comfortably.

plush is medium firm to firm.

My 4 star is more for great price for mattress. I've only had 3 nights of sleep with my new mattress and not able to give a true performance review for the comfort of the mattress. What I can give, I have not awaken during the night or next morning with total body soreness.

Sleepless Nights

We replaced a failing mattress with this Serta Hybrid... it nicely firm and supportive, but not overly hard.  It sits a little higher up than previous mattresses (maybe due to the matching foundation?) but my tall husband appreciates the extra height.

Nice firm mattress

2 1/2 months in and my husband and I still haven’t adjusted to this mattress. It does not have a cooling effect whatsoever, in fact it holds heat. We both wake up with back pain. Now we’re stuck with it and stuck with poor quality sleep. If you’re looking for a new mattress, don’t buy this one.

Horrible

Four months in and this is not good. Much like another reviewer, there’s now a sink hole and I can’t wait to get out of bed because I have to, to stop the aches. Four months, $1000.00 in and I’m stuck with waking up to aches from a mattress. This is really bad, Serta.

Sink hole four months in

Serta Perfect Sleeper X Knox Hybrid Mattress

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Serta Perfect Sleeper X Max Hybrid Mattress