ZINUS 4 Inch Swirl Gel Cooling Memory Foam Mattress Topper, Smaller, More Convenient WonderBox Packaging, Cooling, Airflow Design, CertiPUR-US Certified, Twin
Condition: New
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Availability:
In Stock.
Arrives
Monday, Oct 26
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Size: Twin
Style: 4"
Pattern Name: New Small Box
Features
- Cooling Gel Swirled Memory Foam
- NEW WONDERBOX PACKAGING - This mattress topper ships straight to your door in a box designed for unmatched convenience, plus a reduced carbon footprint! Simply unbox, unroll, and watch as this topper does the rest, expanding to its original shape within 72 hours
- HELLO SLEEP - LET THE AIR FLOW, LITERALLY - The ups and downs and in-betweens of this specially engineered, cooling gel-infused topper promote airflow throughout its conforming memory foam layer to dissipate heat while providing superior softness and comfort
- A COOLING EMBRACE - This 4-inch mattress topper is constructed entirely of supportive memory foam swirled with cooling gel; fits under any standard or deep pocket fitted sheet
- CERTIPUR-US CERTIFIED - Highest quality foam is CertiPUR-US certified for durability, performance, and content
- Worry-free 5-year limited warranty included; a new foam scent is normal and should dissipate within 72 hours
Description
Seeking relief from hot nights without cranking up your AC? We’ve got you covered with the Swirl Gel Cooling Memory Foam Mattress Topper. Packed with specially formulated cooling gel, this thoughtfully crafted topper regulates your body temperature as you sleep, so your internal heater gets a bit of extra help, and so does your energy bill. And, you won’t break a sweat carrying this topper to your room! It ships in our compact WonderBox™ for a reduced carbon footprint and easy maneuvering. To really kick up the cooling factor, its surface is designed with Wave Dynamics technology that promotes airflow and banishes excess hot air. Constructed entirely of soft and enveloping CertiPUR-US certified Green Tea Memory Foam that lets your joints rest easily and naturally, the Swirl Gel Topper doesn’t skimp one bit on comfort or freshness. Throw in a 5-year worry-free warranty and a few hundred happy customer reviews, and you have yourself one well-rounded, sweet-dream- inducing topper available for an incredibly affordable price.
Brand: Zinus
Color: Blue and White
Size: Twin
Fabric Type: Cooling Gel Swirled Memory Foam
Special Feature: Cooling
Brand Name: Zinus
Age Range Description: Adult
Model Name: Swirl Gel Cooling
Number of Items: 1
Manufacturer: Zinus
UPC: 841550354195
Number of Packs: 1
Global Trade Identification Number: 95
Included Components: Mattress Topper, WonderBox Packaging, Greeting Cards
Item Weight: 4.5 pounds
Item Type Name: Mattress Topper
Model Number: AZ-SWFT-400TN
Manufacturer Part Number: AZ-SWFT-400TN
Other Special Features of the Product: Cooling
Closure Type: Pull On
Water Resistance Level: Not Water Resistant
Item Firmness Description: Medium
Fabric Type: Cooling Gel Swirled Memory Foam
Product Care Instructions: Spot Clean Only
Material Type: Memory Foam
Size: Twin
Color: Blue and White
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Oct 26
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
I'm not usually the greatest about writing a review right off the bat. However I got this yesterday, pulled it out and was a little worried it wasn't going to smooth out. But a little stretching, it came out perfect. I have a 2 in memory foam on my bed already, I thought I loved. But already the comparisons of this and my not so old(6mo) memory foam pad a complete difference. This one is more compact. Has a lot more sponginess to it. I put this on my 2in one, and not sure if 5in together was the perfect size or the 3in would do. I'll be moving the 2in to a different bed when that room is complete in construction. I'll update then. I will say, I usually toss and turn all night. Felt like my friends beds that have 10 in memory foam. I don't remember waking up once. Down side, I woke up amazing, no aches pains, but I seriously did not want to get out of bed. Mix that with my memory foam pillow and I could stay in bed all day. Heaven. The pictures that I took are of both memory foam toppers. Bottom is my 6mo 2in topper I got on Amazon prime. And the top on is this one 3in. Oh and my son has a extreme sensitive nose, tested the smell on him to see if I needed to leave it outside first. He couldn't tell at all. He's just waiting on his to come tomorrow. Love it. This was half the price I paid for my 2in. Will order again for the other beds.
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Reviewed in the United States on October 11, 2017 by Michelle's Luxury Hair and Skin Care
Size: Twin
Style: 3"
Pattern Name: Original Box
Pro-tip for people with large dogs, a lot of dogs, or dogs with joint issues: rather than spend tons of money on expensive, poor-quality dog beds, just buy a mattress topper like this and cut it into custom dog beds. I personally waited for the 3in twin topper to go down to about $30, cut it in thirds, made covers out of a waterproof mattress cover (although I've since learned you can buy waterproof dog bed covers), and wrapped the sections in old flat sheets until I make fancy outer covers. For the price of one decent bed from Petco, I got three out of this. As for the quality of the topper itself, it seems really great. After letting it lay out to expand and air out on a table for a couple days (just me waiting for crafting materials to come in, it didn't necessarily need the extra time), it seemed to come up just a couple inches short of regulation twin size, but that seems pretty normal for toppers. The plushness feels really good, and takes a moment to regain shape as per memory foam. The smell does seem to linger, but it's no more strong than an actual new bed, and after airing it out and then putting mattress covers, sheets, blankets, etc, on, it shouldn't be noticeable to a human (it certainly doesn't bother my dogs). I also keep one of these makeshift dog beds under my desk, and have noticed that it does seem to get rather warm when I rest my feet on it (because it is super comfy).
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Reviewed in the United States on March 21, 2018 by HM
Size: Full
Style: 3"
Pattern Name: New Small Box
I have purchased five of these toppers throughout the years.They are incredibly comfortable, so much so that every single person in our household has one on their bed, and we even keep one in our RV to guarantee a great night's sleep on the road. The only minor critique I have is that the memory foam does tend to crack and separate over time in the high-pressure areas where you lay and move the most. Fortunately, the internal cracking doesn't actually change the supportive feel or comfort of the mattress topper at all. It simply shows its age after a while and eventually needs replacing. For the amazing sleep quality it provides, replacing it every few years is entirely worth it. Highly, highly recommend!
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Reviewed in the United States on September 13, 2026 by Kim
Size: Full
Style: 1.5"
Pattern Name: New Small Box
I am really enjoying our foam memory topper. We bought out first one (of this size) for our camper when we first got it in April 2024. My spouse thinks it is makes our camper bed even more comfortable than our regular one at home, which is quite a statement since our camper bed is actually cushions which double as a sofa. We never use it as a sofa and after more than 21,000 miles on our camper since then, that topper has seen a lot of use. On a recent trip we needed to tear down our camper bed setup to dry it out after a major thunderstorm. What we found was that the topper was still viable to use except where the cushions came together. Everything wears out, but it was surprising that it would last so long (2.5 years) and only show cracks where the underlying cushions made for weaker points of contact. Light weight, long lasting, comfortable on our backs after a long day on the trail. With the old one cracked, we just decided to buy the exact same topper as a replacement.
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Reviewed in the United States on September 21, 2026 by Bee
Size: Twin
Style: 3"
Pattern Name: Original Box
I have bought this memory foam topper twice. The first time in 2017, when I got the 3-inch size full. The second time in September 2021, when I got the 3-inch size twin. The short version of my review is that I found the 2021 version of this topper to be far inferior to the one I bought in 2017. It's much stiffer and not nearly as soft, and much slower to spring back. I remember two things about the mattress topper I bought in 2017 – it weighed a lot, and it was the most comfortable thing I've ever slept on. It really was like sleeping on a cloud and I actually looked forward to going to bed every night. After a couple of years, it got a small tear in the middle (I toss and turn a lot, even when I'm comfortable) and I switched to a twin bed, so I reluctantly got rid of the topper. For the next couple of years I tried stacking a couple of 1.5-inch toppers to get the same effect, but they kept getting torn. So I finally decided to go back to the same 3-inch topper I had loved so much before. Right away I noticed the topper weighed much less than before, even taking into account the smaller size. That in itself isn't bad, but it alerted me to the fact that they're using a different kind of foam than whatever they used in 2017. The topper took about 36 hours to fluff up completely, but even after it was completely puffed the texture was just weird and very different from before. It's just stiff and isn't remotely as soft as the 2017 version. When I get up in the morning, there's a huge depression in the middle of the bed that takes several minutes to go away. That's never happened to me with any other mattress topper. I will admit, I am able to get a good night's sleep. It's just comfortable enough that I may end up keeping it. If it wasn't so bulky and I wasn't so concerned about being able to fit the topper back into the box it were shipped in (I'm disabled, so I might hurt myself trying to squeeze it back into the box) I would definitely return it for a refund. I would like to return it, but I'm not sure it's worth the hassle and the possibility of hurting myself. UPDATE: After a couple more nights sleeping on this topper, I'm once again feeling back pains I haven't had for a long time. Maybe the timing is a coincidence but I don't want to take any chances. I have removed the topper from my bed. I tried to stuff it back in to the shipping box, but of course it won't fit now. So I can't return it for a refund. Total waste of money and I wish I'd never bought it.
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Reviewed in the United States on September 29, 2021 by B. N. Connors
Size: Full
Style: 3"
Pattern Name: Original Box
So here’s a detailed & honest review: I got the 3inch one for a full sized mattress in October - put it together in November - used it for 2ish months and took it off in January - tested my bed back without it to now - here are thoughts by end of February Taking it out the box was fine, took 24-48hours to expand, didn’t smell weird or anything However in last 2 photos you can see it didn’t quite expand to a complete rectangle and some edges were slanted Initially I got this because I had horrible back pain and was trying to figure out how to sleep better - in the 2ish months I slept on it, my back pain got worse - taking it off I’m just back where I started. Here’s what I think was the issue - you can see in some photos it dents down when you put weight on it (obviously this happens) , I loved the feeling of it , it was comfy , but as soon as I slept on it so my weight was on it for hours at a time, the indents became kinda like crevices that I would get stuck in, and I move around alot in my sleep so I would end up sleeping all wonky and lumpy on it after my body shape indented and then wouldn’t change - (I hope this makes sense) I think the 3inch maybe is the issue and with a 1 inch or something it would allow you to move with the indents more for support verses get stuck in the indents and no correct support. Not sure though. Obviously I can’t return it now and I have no idea on how to get it back into a box haha, so I don’t know what to do with it yet its just shoved into a closet, also sucks I’m back to square one on how to make my bed comfier for my back pain (Also other details: the bed I have is from the same company! It’s the 12inch green tea infused one, Only 4/5 years old (I think it’s just too stiff for me) - & I weigh 150 if you’re wondering the weight on the topper) Anyways this was a lot of information, but I hope some of this helps anyone
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Reviewed in the United States on March 7, 2024 by Grace H
Size: Twin
Style: 2"
Pattern Name: Original Box
I bought two of these mattress toppers in twin size to use on top of old mattresses at a cabin in Maine. They arrived wrapped up, but a little bigger than I thought, so I only packed one. It worked out very well. I am a light sleeper & worried about tossing & turning all night on an uncomfortable mattress in a cabin with little privacy. Instead I put in ear plugs and snuggled down in comfort on the soft and fluffy mattress pad. Fhat.pad was left as.a gift to the cabin. But I liked it so much I put the other twin on my half of our new firm king size foam mattress. Magically I started sleeping much better. No more turning to get comfortable, no more leg pain in the morning. I was able to sleep through the night. This topper makes a firm mattress softer and alleviates pressure points. The pads arrived partially wrapped in plastic so I left them out in our entryway for 4 days before we went to Maine. That allowed them to outgas most of the noxious foam odor they have. The second pad was thouroughly aired in my sunroom for a few days. I am sensitive to smells and I can say that you really do have to air out any new foam a few days before use. I also use the topper under a mattress pad. With the 2" foam I was able to use our deep pocket sheets. To those who don't have a good washable mattress pad, just get one now. I would never put sheets right over a mattress or foam topper. I loved the nice packaging and the sweet note from the company. I am thinking of ordering another topper from this company for one of our other beds. Maybe I'll try the 4" foam next!
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Reviewed in the United States on August 22, 2018 by Not Hollywood
Size: Twin
Style: 3"
Pattern Name: New Small Box
Bed is cool and soft
Reviewed in the United States on August 9, 2026 by Cindy W