SINWEEK 4 Inch Gel Memory Foam Mattress Topper Ventilated Soft Pressure Relieve Mattress Pad, Breathable Bed Topper, CertiPUR-US Certified, King Size
Condition: New
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Extended holiday returns
FREE refund/replacement until Jan 31, 2026 Learn more
FREE refund/replacement until Jan 31, 2026 Learn more
This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2026
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.
View our full returns policy here.
Availability:
In Stock.
Arrives
Tuesday, Nov 25
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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: Durability,Foldable
Closure Type: Pull On
Brand: SINWEEK
Color: 4 Inch
Size: King
Special Feature: Durability,Foldable
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
Number of Items: 1
Manufacturer: SINWEEK
UPC: 754525795360
Product Dimensions: 74 x 38 x 2 inches
Item Weight: 29.9 pounds
Refill: gel, memory-foam
Batteries required: No
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Nov 25
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Color: 2 Inch
Size: Twin
This worked! It's dense so gives support, slow rebound foam. Conforming so no pressure points, but supports so easy to turn over in bed (not mushy at all) I weigh ~110lbs, got the two inch. If you are under 150lbs, do not get more than two inch. Got the 3 inch for my 100lb mom and it was very very firm. Obviously better for a heavier person, but 100lbs just wasn't enough weight to be able to sink comfortably into it. If you want firm, serious firm then 3 or 4 inch will work for you. Makes me slightly warm at night but no where as much as my old foam topper did. It had no smell and opened up on a spare bed to full in about 1 hour. Very happy with the 2 inch just do not think more is better with this one, I honestly think 1 inch would have been fine for me but did not want to bother to return it. I got the twin, and it was about inch wider than it should be, so I had trim it wth scissors. It took a little bit of time but wasn't horrible to cut through. Hope this review is helpful. I'm very happy with this topper 👍
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Reviewed in the United States on November 11, 2025 by jea
Color: 2in With Cooling Cover
Size: Queen
The 2" gel memory foam was a very good purchase! It was fully inflated in about 8 hours. It was a bit over 2" thick which surprised me in a good way. It seems very well made, the cover is also well made. I sleep very warm 95% of the time. I purchased a new mattress about a week ago, this topper is just what I needed. I no longer sleep too warm, and overall I feel much better and sleep way better. My shoulders and back feel way better now. Definitely worth the money. I have a feeling I'm going to have this for a long time.
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Reviewed in the United States on November 7, 2025 by Jackson
Color: 2 Inch
Size: Twin
My son loves this mattress topper. For Christmas last year he said he wanted a hotel bed. I got him this topper along with other things and he was so excited. It is soft yet firm if that makes sense. It is super stable on his twin bed. There was no smell when it came out of the package. It does not make him feel hotter or colder. He just tells me all the time how comfortable his bed is. Im going to buy one for myself this year.
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Reviewed in the United States on November 7, 2025 by Jennifer
Color: 3 Inch
Size: Queen
It gets warm, perhaps not as warm as some but I’m used to that and I’m ok with it. It puffed up immediately and had a slight offgassing odor. It’s looks good and has no flaws to see. I left it in an unused bedroom for a couple of days but it quickly lost the smell. It felt firm at first so I was concerned about too firm but no, when it warms up with me in it ..sinks a lot. I was concerned at first and not too sure about that but I’m doing ok with it. No more discomfort than my previous topper. Even maybe slightly better. I think I would prefer less of the sinking in where my heavier parts are, but. Gel does that. Perhaps less than this on the average. I weight 129 lbs and I’m short so, if you’re an average sized person, it might sink in too much and you would need a denser topper. Overall I’m not upset and I’m keeping it and sleeping on it. If I decided in a few weeks down the road , that I would be better off on another topper, i’ll adjust my rating.
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Reviewed in the United States on October 23, 2025 by Eva
Color: 2 Inch
Size: Twin XL
Needed a XL Mattress Topper for my Bed in my Toyota Sienna Mini Van. I needed to cut it to fit the bed which was no problem. Put it in a waterproof cover before putting it on the bed. The regular twin might have worked although the bed frame was an Xl. I put it on top of a quality large thermorest camping mattress. It is perfectly comfortable, sturdy with medium softness. Just what I needed.
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Reviewed in the United States on November 11, 2025 by David
Color: 2 Inch
Size: Twin XL
I bought this mattress topper as a surprise for my son who just returned home from being deployed in the Navy. I wanted him to have the most comfortable bed possible, and this topper delivered beyond my expectations! My son absolutely loves it. He told me he has never slept this well before - he doesn't even want to get up in the morning! After everything he's been through during deployment, seeing him sleep so peacefully means the world to me. The topper was incredibly easy to set up. It came well-packaged, was simple to unpack, and took only about 2 minutes to put on the bed. The 2-inch thickness is perfect - not too thick, not too thin - and the quality is excellent, especially for the price.No bad smell when we open it. We're so impressed that we're planning to buy another one for him to take back on the ship when he deploys again in November. If a product is good enough for a Navy sailor to want it on deployment, you know it's worth every penny! Highly recommend this mattress topper to anyone looking for affordable comfort and quality. It truly made a difference in my son's sleep and recovery. My son also said he is pain free.
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Reviewed in the United States on October 12, 2025 by Paubla Maya Paubla Maya
Color: 1.5 Inch
Size: Full
Was attracted to the lavender color (even though it won't be seen), and the 1.5 inch thickness. I sleep on a full size loft bed, which means that I cannot have a super high mattress. I bought a 6 inch ZINUS full sized firm mattress some months' back, in addition to a waterproof mattress cover I really like, plus this week, another mattress pad which gives some additional padding (but not too much). With some loft beds, such as mine, you can't add more height to your mattress set up, above a maximum 7.5–8 inches so that you don't roll out of your bed over the safety rails, and injure yourself. I set this SINWEEK Gel Memory Foam mattress topper on top of the waterproof cover and then put my new EASELAND quilted padded mattress cover over the lavender SINWEEK mattress topper. It is so cushy! I will update once some time has passed. For now, am happily recommending for value and being the thickness needed that works without being too much for reasons of safety. I'm attaching a photo to show how it all looks before I add my sheet set and comforter. For additional information that may help, I'm strictly a back sleeper. RECOMMEND
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Reviewed in the United States on September 13, 2025 by SRD SRD