WhatsBedding 4 Inch Memory Foam Mattress Topper King for Back Pain Relief, Filled with Breathable Memory Foam, Soft Fluffy Supportive Bed Mattress Topper, 80x78x4 in
Condition: New
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$49.99
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- – 6-month term
- – No impact on credit to apply
- – Instant approval decision
- – Secure and straightforward checkout
Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
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FREE 90-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
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At a glance
- Condition
- New
- Color
- White(4in)
- Size
- King
- Material
- Memory Foam
- Special Feature
- Bagged, Pillow Top
- Age Range Description
- All
- Item Type Name
- mattress topper
Features 5
- Good support, fluffy and soft Skin-friendly breathable mattress cover, Combines the softness of Gel memory foam with the support of shredded memory foam, enhanced pressure relief and breathable surface for comfortable sleep.
- Ergonomic designFits the body curve to relieve pressure and pain. While ensuring support, it provides enough softness, bringing cloud-like comfort, balanced support and effective pressure relief, allowing you to sleep more soundly and relax.
- Stable anchor elastic straps4 stable anchor elastic straps ensure a secure fit, keep it at the place no matter how you toss or turn on bed.
- New dot quilting designThis mattress topper is made of high-quality fabrics and New dot quilting technology to ensure that the filling is evenly distributed and prevent lumps after long-term use.
- Warm TipsOur mattress topper is vacuum compressed and packed. Due to the lack of air, it may not look thick enough after opening. Please pat the mattress cover gently and let it stand for 24 hours to achieve the best fluffiness. Whatsbedding focuses on customers' shopping experience. If you have any questions or concerns, please feel free to let us know!
Specs 18
| Brand | WhatsBedding |
|---|---|
| Color | White(4in) |
| Size | King |
| Fabric Type | Polyester |
| Special Feature | Bagged, Pillow Top |
| Brand Name | WhatsBedding |
| Age Range Description | All |
| Model Name | Memory Foam Mattress Topper |
| Number of Items | 1 |
| Manufacturer | WhatsBedding |
| Unit Count | 1.0 Count |
| Item Type Name | mattress topper |
| Other Special Features of the Product | Bagged, Pillow Top |
| Closure Type | Pull On |
| Water Resistance Level | Not Water Resistant |
| Product Care Instructions | Dry Clean Only |
| Material Type | Memory Foam |
| Thread Count | 400 |
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Frequently asked questions
This product is currently out of stock. Please check back later for shipping info.
Yes, absolutely! You may return this product for a full refund within 90 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Was worth every penny
It's fluffy and comfortable quality is great price was affordable easy to use slept good through the night
Reviewed in the United States on April 4, 2026 by Lisa Farrell
Pat/ Knit the foam areas the first 1.5 hours to help it expand!
This Mattress cover has completely changed our sleep! We have been sleeping on an older mattress that has hardened over time. We have had problems with back pain and constantly waking up. The set up was pretty easy; I saw some reviews where they had trouble with fluffing it all the way, when I received the package I spread it completely out and began knitting the cushioned area; I would do so every 15-20 minutes; after a hour and a half of this process I let it finish rising without the knitting process. After around 3-4 hours it completely finished. We’ve had this product about 2 weeks and we haven’t had any issues!
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Reviewed in the United States on January 19, 2026 by Makayla
Do not buy this
Worst purchase I have ever made let it sit unfolded for about 36 hours then put it on my bed it was very lumpy I have slept on it for over a week and it is still lumpy taking it off my bed and will purchase something else I would not recommend buying this product.
Reviewed in the United States on December 28, 2025 by Amazon Customer
Definitely A Must Have
I ordered this 4 inch Memory Foam for.our king size bed. Wow. It has made a big difference in our sleep. It was easy to install and it is so comfortable
Reviewed in the United States on January 20, 2026 by Darla Godeaux
Love
It’s been almost a month now. Love this!
Reviewed in the United States on January 26, 2026 by Andrea Parker
Comfort
It's lumpy. Not very comfortable it's not what the product described
Reviewed in the United States on December 23, 2025 by terrie schmidt
Awesome. Super soft memory foam. Cooling as well.
Amazing. Super soft. Give it time to fluff. But amazing topper
Reviewed in the United States on December 2, 2025 by Autumn
The thickness
The mattress pad is is fantastic you can fluff it up too .
Reviewed in the United States on January 7, 2026 by Dirk Adams