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SINWEEK

SINWEEK 4 Inch Gel Memory Foam Mattress Topper Ventilated Soft Pressure Relieve Mattress Pad, Breathable Bed Topper, CertiPUR-US Certified, King Size

    • Based on 5,544 reviews
Condition: New
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Availability: 16 left in stock
Fulfilled by Amazon
Arrives Thursday, Feb 13
Order within 7 hours and 52 minutes
Available payment plans shown during checkout

Color: 4 Inch


Size: King


Features

  • GEL MEMORY FOAM MATERIAL: Our memory foam mattress topper readily conforms to the curves and shape of your body, distributes weight evenly to alleviate pressure points for better sleep.
  • MORE COMFORTABLE SLEEP: The gel memory foam material used in our mattresses reduces heat and improves the airflow to refresh the gas permeability; add to the mattress for custom comfort.
  • SOFT BUT NOT FOLDABLE: our mattress is soft, do not roll up and store too long after opening, and do not put items on top, which will increase the risk of tearing.
  • CertiPUR-US CERTIFIED: Our Gel Swirl memory foam topper is made of CertiPUR-US certified materials. The Gel Swirl memory foam topper meets or exceeds standards for content, emissions, and durability.
  • BEFORE FIRST USE: leave the memory foam flatly in a well ventilated area for 48-72 hours until its fully expanded. In addition, we offer a three-year warranty and 24-hour manual customer service to ensure your after-sales service.
  • NOTE: The softness of the Mattress Topper is influenced by the temperature. In the cold winter Mattress Topper will become harder.

Brand: SINWEEK


Color: 4 Inch


Size: King


Special Feature: Temperature Control


Closure Type: Pull On


Brand: SINWEEK


Color: 4 Inch


Size: King


Special Feature: Temperature Control


Closure Type: Pull On


Product Care Instructions: General care instructions as needed for a mattress cover


Water Resistance Level: Not Water Resistant


Age Range (Description): Adult


Material: Memory Foam


Model Name: Purple


Number of Items: 1


Manufacturer: SINWEEK


UPC: 754525795360


Product Dimensions: 74 x 38 x 2 inches


Item Weight: 29.7 pounds


Refill: memory-foam, gel


Batteries required: No


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Feb 13

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • This thing is AWESOME!
Color: 3 Inch Size: Queen
Got the 3" Queen. Opening it up it was as wrinkled looking as a newborn LOL and had me a bit worried, but it fluffed up brilliantly in a few hours. This foam is one that feels a little firm at first, but softens when you lay down on it as your body heats it up, so don't be fooled by how firm it might seem at first - it is, but then it softens and you sink into it and it's so soft and supportive at the same time. I have 3 herniated discs and my old mattress and toppers were starting to break down (they had a good 12 year run, they earned their retirement lol) and got this and a new mattress. I've used lots of toppers - tried many over the years to help with my back and also shoulders, and this one is an amazingly good quality - it's what you want, supportive without totally collapsing it's just brilliant. I'm on the plus side so went with the 3" thick one, but folks of a regular healthy weight would do just fine with a 2" one. Fabulous purchase and worth every penny! ... show more
Reviewed in the United States on December 11, 2024 by Lisa
    • Very comfortable to sit and sleep upon - no complaints!
Color: 2 Inch Size: Twin
I'm staying in a place where the mattress is cheap and the internal support is very evident and can often be felt. I do not have the ability to obtain a better mattress, so I bought this topper in the hope that it would help. It didn't just help; it totally transformed the bed into one that I'm happy to comfortably sleep upon every night. Setup was easy, though I ignored the recommendation to let it sit unrolled for a day to fully expand. I did let it expand for a bit but then started choosing two spots on opposite sides and slowly, gently pulling them apart, doing this in various places but especially anywhere that seemed to be expanding slowly. The mattress had a mattress protector on it that had extra room in it, so I set the topper up inside the protector to help preserve it and prevent it from moving too much. The mattress has a plastic cover so the protector did shift a bit from my sitting on it while leaning against a wall, essentially putting horizontal force on it. Looking online I found recommendations to use anti-slip mats normally used under area rugs, but the store I tried didn't have these. What they did have was rolls of cabinet shelving material designed to prevent things on the shelves from moving about accidentally. Each was six feet long by one foot wide so I bought two and placed them about a foot apart on top of the mattress. Success! The topper stopped moving about and has barely needed any adjustment since then. I'm very happy with my purchase and would buy it again if needed. ... show more
Reviewed in the United States on December 5, 2024 by Perry A.
    • Seems Comfortable
Color: 2 Inch Size: Twin
I have not slept on it yet but I have spent some time laying on it and it feels comfortable so far. It is nice and thick as advertised. It comes vacuum sealed after being folded and rolled so it’s quite flattened out. The paper that came with it said it could take 48-72 hours to expand fully but suggested using a blowdryer. Took me maybe 15 minutes to get it fully expanded and ready for use. Definitely appreciated the tip coming with it otherwise I’d be sleeping uncomfortably tonight ... show more
Reviewed in the United States on January 24, 2025 by Robert H
    • An ok choice, not the best.
Color: 3 Inch Size: Full
I’ve been looking for a replacement for my super soft 2 inch Walmart memory foam topper that I love and have had for years but because it’s been years I don’t know the brand to get another lol. I was eyeing this topper and got it on Black Friday deal which is exactly what I recommended whoever reading this to do. This topper is very dense, not hard but dense, I got the 3 inch full size and it’s definitely not as soft or slow to puff up as my old Walmart memory foam topper, one review before I got it said this topper is “medium- soft” I’d say it’s more medium and the surface is a little rough but the middle is softer, I live in a warmer area so it’s not the foam reactiving to the environment either it’s just not the softest topper in the world. I think because it’s so dense, not hard but dense, it makes my bed a little firmer and it’s definitely made my platform bed taller. It’s a very ok topper, not the softest or the hardest, get it on sale. I don’t “sink” in but I find it is slightly conforming to your body, it’s nothing crazy like a water bed, it’s just overall an ok topper. ... show more
Reviewed in the United States on November 26, 2023 by Deva Wimbley
    • Well sized, comfortable
Color: 2 Inch Size: Twin
Review Image by Carey & Melissa Carey & Melissa
It arrives folded lengthwise (X3) then rolled. I gently unrolled it, left it to start expanding 20min, then very gently unfolded onto the thin fabric backing it comes with. Less than an hour later, it fully expanded to what you see here. My son (11) and I both sunk into it decently but not so much I sunk through all 2" of it to touch the floor. When we placed it on the mattress, I was surprised that it (Twin) seemed to be about 1-2" wider and longer overall. I was thrilled that it's full edge-to-edge coverage of the Mattress (Serta plush 10" deep) and also happy that it came with a large enough fabric backing that it was not in direct contact with my floor. I also bought a bamboo-quilted mattress topper/pad that comes in a few days but I expect he will like the new feel. He didn't like how firm it was before this. Minimal smell, but it didn't smell bad in any case. More like fabric softener to me. With the vent holes and gel infusion, I'm hoping it's cooler than my modern Temperpedic topper. ... show more
Reviewed in the United States on January 2, 2025 by Carey & Melissa Carey & Melissa
    • So comfortable
This 3inch memory foam topper is amazing. I suffer with gluteal tendinopathy and I haven’t been able to sleep on my side in years. I was able to sleep on my side for the first time with no pain or discomfort. I highly recommend this topper. It’s cool and molds perfectly to your body. Love it.
Reviewed in the United States on January 6, 2025 by mark a tamucci
    • Surprisingly Great
Color: 1.5 Inch Size: Queen
I never write reviews but I had to make one for this because the value is so good. I bought a queen size 1.5” thick topper hoping that it would improve my rooftop tent sleeping pad. I cut it down to the correct size (Full XL) easily, and it made the camping pad so comfy I look forward to sleeping in my tent now. I really didn’t expect too much from just 1.5” but it surprisingly provides a lot of cushioned support and doesn’t feel like my body just sinks directly through it. Also, it puffed up after unpacking it within like 20 minutes and there’s NO smell at all in my opinion. For the money I’m super pleased with this thing ... show more
Reviewed in the United States on December 18, 2024 by corey stenlake

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