MallowCore™ is our high-density support material — nearly 5,000 GSM per square meter, more than double the industry average of under 2,000 GSM. It's built around high-density gel-infused memory foam with over 100,000 micro-gel particles and 400+ ventilation channels engineered into the material. The density holds your body weight AND adapts to your shape at the same time — that's why the toppers that failed you went flat. They didn't have enough material to do the job.
Trusted by 58,901+ Sleepers
Wake Up Pain-Free.
4.8 Rating
CertiPUR-US & OEKO-TEX Certified
3-Year Warranty
Wake Up Pain-Free.
Sleep Like Never Before.
The Marshmallow Mattress Topper is built with MallowCore™ — nearly 5,000 GSM of high-density support material per square meter. That's more than double what's inside the topper that went flat on you.
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From $79.90
58,901+
Pain-free sleepers
The Science
The Density Gap.
The Density Gap.
And How MallowCore™ Closes It.
Most toppers contain under 2,000 GSM of support material. MallowCore™ packs nearly 5,000. That's why everything else went flat — and this won't.
MallowCore™ Density Demo
Press it. Watch the slow rebound. That's nearly 5,000 GSM of MallowCore™ holding the shape your body made.
Nearly 5,000 GSM of Density
MallowCore™ packs nearly 5,000 GSM of support material per square meter — more than double the industry average. That density holds your body weight AND adapts to your shape at the same time. The toppers that failed you? Under 2,000 GSM.
100,000+ Visible Gel Particles
Over 100,000 micro-gel particles infused through every inch of MallowCore™ — not sprayed on top. You can see them with your own eyes. They draw heat away from your body and distribute it through the material.
400+ Ventilation Channels
Over 400 precision airflow channels punched through the full depth. Press MallowCore™ and watch the air push through. Sleeps cooler than standard memory foam — the gel and channels work together to regulate temperature.
JC
"One of the most effective non-invasive solutions I recommend to patients dealing with chronic morning stiffness and sleep-related back pain."
Dr. James Chen
Board-Certified Physical Therapist
The Marshmallow
One Topper. Three Levels of Relief.
Choose the thickness that matches your pain level and mattress condition. All three are built with MallowCore™ — nearly 5,000 GSM of high-density support material. All three come with our 90-Day Guarantee.
2" Thick
The Refresh
A comfort upgrade for mattresses that are still in decent shape. Mild stiffness, occasional aches, stomach and back sleepers.
From $79.90
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MOST POPULAR
3" Thick
The Rehab
The sweet spot. Cradles hips and shoulders while keeping your spine aligned. For regular back, hip, or shoulder pain. Chosen by 70% of customers.
From $99.90
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4" Thick
The Overhaul
Maximum pressure relief. For chronic pain, very old mattresses, heavier sleepers, and anyone whose previous toppers pancaked flat.
From $129.90
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Free Shipping
3-7 business days
90-Day Guarantee
Full refund, no hoops
3-Year Warranty
Full coverage
BEFORE
AFTER
Customer Unboxing
Real Results
See It. Feel It.
SHOP NOW
See It. Feel It.
Sleep On It.
Press it. Watch it come back slowly. That slow return is nearly 5,000 GSM of MallowCore™ holding the shape your body made. You can see the 100,000+ blue gel particles throughout the material. You can see the 400+ ventilation channels. It looks different because it is different.
Pressure relief from night one
No fiberglass, no toxins, no off-gassing
Works with your existing mattress and bedding
The Proof
How It Scores. What They Say.
58,901+ verified reviews. Five scoring categories. Real words from real buyers.
Rating Breakdown
Comfort
9.4
Pressure Relief
9.6
Durability
9.1
Cooling
8.8
Value for Money
9.5
9.3 / 10
Overall score from 58,901+ reviews
44%
bought same day they saw the ad
"I have fibromyalgia and used to wake up every morning needing pain medication just to get out of bed. This topper changed my mornings completely. I actually sleep through the night now."
"I spent $3,500 on a new mattress and the pain was still there. My daughter told me to try this before spending more money. 8 months later — still feels like week one. It truly works and is worth the money."
"Pain relief as a side sleeper. I was waking up with shoulder and back pain every day. The Marshmallow actually pushes back. Shoulders and hips sink in just enough. My back stays aligned."
"Sleeping cooler in the summer and no hip pain when sleeping on my side. My husband tried mine and immediately ordered his own. We've had the best sleep of our lives for 8 months now."
"I'm a retired RN, 81 years old. I've been sleeping in my recliner for months because the bed was unbearable. First night on The Overhaul — back in bed. Six months later, hasn't flattened one bit. It truly works."
"I don't have a lot of money. I'm a single grandma, but we need something comfortable. I couldn't afford a mattress. This was smart, not cheap. My grandkids fight over who gets to sleep in my bed now."
"At 78 years old it means everything. I travel a lot and I am quite active in the summer. I tried 3 different toppers before this. No success. This was my last hope — and it actually worked. Didn't stink when I opened it either."
"Hopeful that I could avoid buying a new mattress. The ad was very persuasive — I hoped it was as advertised. It is. Stays cool all night and I'm not wasting money on another solution that doesn't work."
"I'm 67 and sleep on my side. Every topper I've tried goes flat within weeks where my hips press in. This one cradles without collapsing. Five months and counting — still supportive every single night."
Compare
Why Marshmallow Is Different
Marshmallow
Generic Toppers
Material Density
MallowCore™ (~5,000 GSM)
Standard Foam (<2,000 GSM)
Gel Infusion
100,000+ micro-gel particles
Surface spray or none
Ventilation
400+ engineered channels
None
Guarantee
90 days, full refund
30 days or none
Certification
CertiPUR-US & OEKO-TEX
Varies
Warranty
3 years
1 year or none
FAQ
Common Questions
The Refresh (2") is for mattresses that are still decent but need a comfort boost. The Rehab (3") is our most popular — it's the sweet spot for regular back, hip, or shoulder pain. The Overhaul (4") is for serious pain, very old mattresses, or anyone whose previous toppers pancaked flat. 70% of customers choose the 3".
Sleep on it for up to 90 nights. If it doesn't work for you — for any reason — contact us and we'll arrange a full refund. No restocking fees, no hoops to jump through. We built this guarantee because we know what it's like to buy something that doesn't deliver.
The Marshmallow is dual-certified: CertiPUR-US AND OEKO-TEX — independently tested and verified to be free of harmful chemicals, heavy metals, formaldehyde, and phthalates. We're the only topper brand in this space with both certifications. There is zero fiberglass in any Marshmallow product. Minimal to no smell on unboxing.
Yes. The Marshmallow sits directly on top of your current mattress. Use your regular fitted sheet over it, and any mattress protector you already have works fine on top. No special bedding required. Ships compressed in a box — just unroll and let it expand.
Your Fifth Topper.
Or Your Last.
90 days to feel it yourself. If it sinks like the others, send it back. No questions. No hoops. Just honest sleep — or your money back.
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90-Day Guarantee
Free Shipping
3-Year Warranty