Blue Fusion 4000 Plush Pillow Top

(7 customer reviews)

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The Serta iComfort Hybrid Blue Fusion 4000 Plush Pillowt Top mattress is a premium hybrid mattress that combines the plush, cushioning comfort of a pillow top mattress with Serta’s most advanced temperature regulation technology. It features Serta exclusive TempActiv™ gel memory foam and a layer of EverCool® Fuze Gel Foam for enhanced airflow and pressure relieving comfort.

Top Layers of Comfort
It Starts with ¼” Serta® PillowSoft® HD foam and PillowSoft® Aire fiber in the top to provide immediate comfort and a very soft feel. The 2” TempActiv™ Gel Memory Foam provide contouring support, great pressure relief and temperature regulation. The Serta® Micro Hybrid Coils™ add conforming support and help reduce the chance for a body impression. Finally, the ½” EverCool® Fuze Gel Foam adds more temperature control and another layer of pressure relief for a truly pillow soft feel.

Core Layers of Support
The Serta® Hybrid Coil Support System with Best Edge® Foam Encasement is a next generation coil. It acts like 3 coils in one. The bottom part of the coil is very firm to provide extra support. The middle part of the coil gives slightly more to relieve pressure and the top portion is designed to provide excellent conformation to your body and spine.

Our Recommendation
The Serta iComfort Hybrid Blue Fusion 4000 Plush Pillow Top mattress is the ultimate Serta Hybrid if you want a medium firm feel without losing some extra cushioning. It will contour to your body and support you while providing superior pressure relief. It’s a great choice for even the most finicky sleeper, but we believe this mattress is especially great for side sleepers that have experienced painful pressure points on previous mattresses.

  • Twin XL
  • Full
  • Queen
  • King
  • Cal King
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Additional information

Dimensions N/A
Bed Size

Twin XL, Full, Queen, King, Cal King




iComfort Hybrid

Comfort Type

Ultra Plush

Mattress Type



10 Years

Comfort Layers

Advanced Adapt™ Foam, Primacool™ Performance Fabric, Primasense™ Gel Foam

Support Structure

Intellicoil® Advanced

YouTube ID


7 reviews for Blue Fusion 4000 Plush Pillow Top

  1. Arb34

    I love the fact it vibrates and also you can adjust the head and foot to the bed. The only thing I don’t like is how high up it sits. My baby sleeps in the bed with us so it scares me that one day she’ll roll over and hit the floor from so high up. Other than that it has been absolutely Amazing!!!!

  2. Alleylovesjenna143

    The mattress is very comfortable and very firm it was complety sealed which is always great when you have so many kids we did keep the seal on it! I Defienely recommend this mattress

  3. KirstinG1532704415

    This mattress is comfortable and supportive. It keeps me cool and I fall asleep instantly. The best part: I stay asleep all night! I wake up feeling refreshed and energized and I could not be happier with this purchase. Thank you Serta! I can get so much more accomplished in a day now that I have this bed.

  4. Andreah5

    I am very pleased with this mattress and box spring! I love the gel feature because my bed doesnt get all hot and stays at just the right tempature with that gel. This is by far the most comfortable bed Ive ever had. The mattress is really thick which I like. It is a pretty heavy bed but well worth it for the comfort it provides. The stitching all around it was done with quality and care. I have laid on it on both sides, my back, and belly and have yet been uncomfortable in any position. The quality of this mattress is beyond my expectations. I love this bed so much Im replacing everyone’s beds with this type of mattress.

  5. Sunny1

    I can’t believe the quality of this bed and the TREMENDOUS difference in comfort. The mattress itself measures approximately 16″ deep/thick including the pillow top. Superior quality materials with great detail to stitching and design. You have to have DEEP corner sheets which luckily I had on hand. After the first night using it I had a super nights sleep…An absolutely restful sleep in total comfort…and was pleasantly surprised to find I can even sleep on my left side again with no discomfort. I hadn’t been able to lay on that side for over 6 years due to having a bad hip then a hip replacement. The old mattress was so bad I couldn’t lay on that side for more than ten minutes without it causing pain and discomfort from jabbing right into the replacement. I would barely be able to move due to stiffness in the morning.

    That was the first thing I noticed about this mattress. I can get up with no stiffness and a good nights rest with no tossing and turning to get comfortable. My husband was constantly getting out of bed with the old one, He is sleeping a lot better with no tossing and turning all night long. He keeps saying how soft and comfortable this one is and likes the height of it as well. Also he says his arthritis/pain seems to be a lot less since getting this mattress due to the comfort and design. He gives it a big A+ for comfort and quality.

    When it did arrive I had to do some remodeling of our current bed frame due to the thickness of the mattress with the box frame which I was pleasantly surprised came with it. It is well made and designed as well and very sturdy. I have noticed no pressure points and very soft, comfortable, restful sleep with this mattress set. No sagging either and I expect that the way it is designed and the quality it never will and we should have many years of comfortable, restful nights.

  6. DavidS1529516175

    Much more comfortable than my old mattress. Love the cooling ability.

  7. Kk1989

    Pros: memory foam hybrid, supportive, extremely soft, cushiony conforming, very little motion transfer

    Cons: none

    The Blue Fusion 4000 Plush Pillow Top mattress is the best mattress I’ve ever slept on. The support is amazing and it’s beyond soft and very cushy. This is a mattress you truly sink into. I’ve never slept on a mattress that feels like I’m sleeping on a cloud. I purchased a 7” frame that supports a box spring and it’s quite tall! I love how big this mattress is. Although, it does need a deeper fit sheet set.

    There are so many things I like about this mattress and there is nothing I dislike about it. I think the cooling aspects are extremely great for someone who gets hot during the night. It truly does keep me cool and comfortable all night long. I don’t wake up drenched in sweat like I did on a previous mattress without cooling.

    I also like that the motion transfer is kept to a minimum. I don’t get disturbed by my husband moving around. While in the past, every movement would transfer and my

    sleep would be very Interrupted.

    But, I’m mostly impressed with how soft and comfortable this mattress is. On my old mattress I spent hundreds with mattress toppers trying to achieve what this comes with. It needs nothing else for comfort. It’s truly amazing.

    Overall this is a great mattress. It’s extremely comfortable, supportive, plush, cooling, and limits motion transfer. I would recommend this mattress.

  8. SueO1532006467

    They say you should replace your old mattress every ten years. Let’s just say, ours was a bit older!! In the store we tried both the 1000

  9. Cbwifey09

    I love my Serta I comfort hybrid mattress! I love the fact that it is thick and supports every area of my body. I don’t believe I”ve experienced a more comfortable mattress. I have no problems sleeping at night anymore . My parents are actually considering purchasing one also .

  10. Nichole70

    I haven’t had a new mattress in over 10 yrs. I was so determined to sleep on this mattress the day it was delivered, and I did. I put the mattress and box spring on by my self.

    The material of the mattress is amazing, the comfort is awesome. I slept like a baby that night. The mattress is so comfortable, I honestly didn’t want to get out of bed the next day. Even my 14 yr old son loves the mattress. When you lay on it you do not feels springs, and you do not sink in. I’m soo happy with my mattress. Definitely recommend this mattress to those that are looking to purchase a new one.

  11. ChristyW

    My husband and I have been looking for a new bed for what feels like forever. I am now 7 mos. pregnant and we just got the Serta Blue Fusion 4000 Plus Pillow Top and it is heaven. When you climb in it is soft and squishy and then as you lay there you realize it is firm and you are supported. I have been sleeping so much better since we got this new mattress. I wish we would have gotten it months ago. I love that I can move around to get comfortable and it does not disturb my husband. I would recommend this bed 1000 times over. Also, I was really worried that this would feel too warm when I was trying to sleep but I have not ran into that at all! I am totally satisfied.

  12. monte2008

    The Blue Fusion 4000 Plush Pillow Top by Serta makes you feel like you are being cuddled all night long. It manages to be both form and supportive yet soft and comfy at the same time. One of the best features I love about this is that fact it doesn’t make any sounds. If you roll over in the middle of the night, you won’t wake up your partner and only you will move. No matter how warm the day is when I climb into bed at night it is always cool and relaxing. This mattress seems to cater itself somehow to your specific body. My husband has had back pain for the past few months and he remarks how much better his back feels after sleeping on this mattress. The only thing that was jarring at first is how tall the bed is. It almost seems like you have to jump up into bed at night. This however is not an issue. It’s just something to be aware of. I would totally recommend this very mattress to anyone who is craving a good night’s sleep.

  13. Katrinabyers

    this bed is the greatest. It is very soft and comfortable. The gel foam inside makes for a cool nights sleep. I slept like baby great mattress all the way around.

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