This is the kind of comforter you want to stay in bed for. It's incredibly fluffy and cozy but somehow still feels light instead of heavy.
Susan C.
Verified Customer
CloudFill Duvet Insert
$79.99
$119.99
Savings based on comparable value.Learn more
Pricing Disclosure
The listed comparable value represents the manufacturer's suggested retail price or the average retail price of similar products with comparable features, materials, and construction available from major retailers at the time of listing. Mellow's sale price reflects our direct-to-consumer pricing model, which eliminates traditional retail markups. Comparable values are reviewed periodically and may not reflect real-time pricing from all retailers.
Premium Goose Down-Like Loft
CloudFill™ That Stays Fluffy
Warmth Without Overheating
Lightweight, Cloud-Like Comfort
All the Fluff, None of the Feathers
Stays Even & Secure Inside Any Duvet
30-Day Trial
Hassle-Free Returns
Overview
Meet the Mellow CloudFill™ Duvet Insert, our next-generation down alternative designed to give you the fluffy, luxurious feel of premium down without the feathers, clumping, or flattening.
Inside, CloudFill™ Biomimetic Fiber Technology uses ultra-fine microfiber clusters engineered to mimic the lofty structure of premium goose down. The fibers rebound quickly and resist flattening and clumping, helping your comforter stay fluffy night after night.
Handcrafted 3D Air Chamber Construction creates insulated pockets that hold onto cozy warmth while allowing excess heat and moisture to escape. The result is lightweight, breathable comfort that keeps you cozy without feeling heavy or overly hot.
Exceptionally soft, lofty, and easy to care for, CloudFill™ delivers the kind of comfort you can't wait to crawl under every night.
Materials
Outer Shell: Premium Down-Like Shell
Exceptionally soft, breathable, and smooth against the skin for lightweight, all-night comfort.
Fill: CloudFill™ Biomimetic Fiber
Engineered ultra-fine microfiber clusters create cloud-like loft, lightweight warmth, fast rebound, and lasting resilience without feathers, odors, clumping, or fill leakage.
OEKO-TEX® Certified materials.
Care
Machine wash cold separately only when necessary. Tumble dry low. Do not bleach. Do not iron. Do not dry clean. Fluff thoroughly after washing to restore maximum loft and maintain CloudFill™'s lightweight, cloud-like comfort.
FAQ
What makes CloudFill™ different from a traditional down alternative comforter?
CloudFill™ uses specially engineered ultra-fine microfiber clusters designed to mimic the airy, lofty structure of premium goose down. The fibers rebound quickly after compression and resist clumping and flattening for longer-lasting fluff.
Is the CloudFill™ Duvet Insert good for hot sleepers?
CloudFill™ is designed for balanced temperature control. Its 3D Air Chamber Construction retains comfortable warmth while allowing excess heat and moisture to escape, helping you stay cozy without feeling overly hot.
Does CloudFill™ contain real down or feathers?
No. CloudFill™ is completely feather-free. You get the fluffy loft and luxurious feel associated with premium down without feathers, quills, odors, or fill leakage.
Can I use the CloudFill™ Duvet Insert year-round?
Yes. CloudFill™ combines lightweight warmth with breathable construction, making it designed for comfortable use throughout the seasons.
Will the fill clump or flatten over time?
CloudFill™ fibers are specifically engineered for fast rebound and lasting resilience. The handcrafted box construction also helps keep the fill evenly distributed throughout the duvet.
Is the CloudFill™ Duvet Insert machine washable?
Yes. Machine wash cold separately only when necessary and tumble dry low. Fluff thoroughly after washing to help restore its maximum cloud-like loft.
Is CloudFill™ OEKO-TEX® Certified?
Yes. The CloudFill™ Duvet Insert uses OEKO-TEX® Certified materials.
This is the kind of comforter you want to stay in bed for. It's incredibly fluffy and cozy but somehow still feels light instead of heavy.
Susan C.
Verified Customer
Meet the Down Alternative That Does More.
All the fluffy, cozy comfort you want from premium down, reengineered to stay lofty, breathable, and incredibly lightweight night after night.
CloudFill™ That Actually Stays Fluffy
Ultra-fine CloudFill™ fiber clusters mimic the airy structure of premium goose down while rebounding quickly after compression. Unlike traditional fills that can flatten and clump over time, CloudFill™ is engineered to maintain its cloud-like loft and evenly distributed comfort.
Warm Without the Weight
Our handcrafted 3D Air Chamber Construction creates insulated pockets that hold warmth close while allowing excess body heat and moisture to escape. You get that perfectly cozy, tucked-in feeling without waking up overheated or weighed down.
All the Luxury. None of the Feathers.
Get the lofty look and plush feel of premium down without feathers, quills, odors, or fill leakage. CloudFill™ delivers consistently fluffy, clean comfort that's easy to care for and made for everyday sleep.
Customer Reviews
Overall rating: 4.9 / 5 from 26 reviews.
Love this duvet insert and my boyfriend does too. I agonized for a weekend about what insert to get for a winter change up for my bedding and I’m happy I landed on this one.
I wanted to achieve this minimalist clean floofy look that I’ve been seeing on pinterest!! I have a queen size mattress so I bought a King Cloud insert and put it in a white Queen duvet cover. Super glad I sized up. When I got the insert I put it in the dryer on low and it puffed up seriously like a cloud. OBSESSED.
I also love that this insert is VEGAN!!! Lots of people suggest a down insert but this is way better. Down may be comfortable but the Cloud alternative filling gives the same look and feel and it’s not haunted by 100’s of dead birds like down is…… Seriously, I wanted the experience of down and this does it exactly.
My one small complaint is that this insert is WARM. It’s not quite winter yet and I am waking up a little sweaty. But once it’s actually cold out I think it will be no problem.
If you’re looking for a down or down alternative and comparing 10 different options please take my advice and go with the Mellow Cloud insert one size up from your bed size. Customer service is also amazing!! I wanted to change my initial order and the help I got over email was super fast and easy. Detailed tracking is also provided which I appreciated.
This is the best duvet insert I have ever bought. I've always been a fan of duvets but this one is everything you want in a duvet insert. Its fluffy and a very good weight. It is high quality and would definitely buy again. In my video, I have it inside my duvet cover. Its wonderful
pleasantly surprised! We just moved to Florida keys from Oregon and knew the traditional down blanket would not work in the heat.
Took a risk and we love it.
Its unique light, squishy, puff puff fill is so soft. keeps us warm and cool at the same time.
We will definitely order another for the guest bed!
I wasn’t sure about it at first only buying because I had seen videos on the internet. I LOVE this set. We have the duvet/sand color sheets and it is the most comfortable blanket I have ever owned. Washed a few times now, still soft, still fluffy.
I truly love this set. I love that the duvet also provides opportunity to change colors as seasons change!
I was pleasantly surprised with the softness of all the material that even the cover was made out of. I also have enjoyed the weight of it. It is very comfortable without being confining.
Just like the pillows- it is soft and fluffy without being to heavy- love it! Loops on the corners for duvet cover ties make everything stay in place without extra gadgets!
I love the look and feel of down but didn't want feathers. This gives me the same fluffy, cozy feeling without any of the things I don't like about down.
Inspired by the structure of premium goose down, ultra-fine microfiber clusters create exceptional loft while resisting flattening and clumping. The result? A comforter that stays ridiculously fluffy.
3D Air Chamber Construction
Individual air chambers help trap cozy warmth while releasing excess heat and moisture, creating balanced, breathable comfort throughout the night.
Frequently Asked Questions
What makes CloudFill™ different from a traditional down alternative comforter?
CloudFill™ uses specially engineered ultra-fine microfiber clusters designed to mimic the airy, lofty structure of premium goose down. The fibers rebound quickly after compression and resist clumping and flattening for longer-lasting fluff.
Is the CloudFill™ Duvet Insert good for hot sleepers?
CloudFill™ is designed for balanced temperature control. Its 3D Air Chamber Construction retains comfortable warmth while allowing excess heat and moisture to escape, helping you stay cozy without feeling overly hot.
Does CloudFill™ contain real down or feathers?
No. CloudFill™ is completely feather-free. You get the fluffy loft and luxurious feel associated with premium down without feathers, quills, odors, or fill leakage.
Can I use the CloudFill™ Duvet Insert year-round?
Yes. CloudFill™ combines lightweight warmth with breathable construction, making it designed for comfortable use throughout the seasons.
Will the fill clump or flatten over time?
CloudFill™ fibers are specifically engineered for fast rebound and lasting resilience. The handcrafted box construction also helps keep the fill evenly distributed throughout the duvet.
Is the CloudFill™ Duvet Insert machine washable?
Yes. Machine wash cold separately only when necessary and tumble dry low. Fluff thoroughly after washing to help restore its maximum cloud-like loft.
Is CloudFill™ OEKO-TEX® Certified?
Yes. The CloudFill™ Duvet Insert uses OEKO-TEX® Certified materials.
Trusted By Thousands Of Happy Sleepers
Real people are sleeping deeper, cooler, and more comfortably with mellow.
0%
of mellow customers sleep at their ideal temperature
0%
would recommend mellow to their family and friends
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