Cozy Earth Bamboo vs. Down Alternative Insert: I Tested Both (Here’s Which to Buy)

Everyone has the certain things they’re particular about … maybe it’s the exact brand of coffee creamer, a specific pillow you travel with or which way the toilet paper roll faces. Mine just happens to be duvet inserts. I’m particular about bedding in general, but duvet inserts are one of the things I’ve found make the biggest difference in how I sleep and how much I look forward to crawling into bed at the end of the day,

After years of living with good enough ones because that’s just what I had, my husband and I happened upon my all-time favorite down duvet insert when we bought our first king-size bed. It’s a truly glorious blanket, and it made me finally started paying attention to what actually goes inside the cover, and it turns out it makes a huge difference between a bed you get excited to climb into and one that you wake up in feeling clammy at 2 AM. Since then, I’ve gotten to test a pretty big range of bedding through both this blog and my work as a home and garden editor, and it’s only solidified my stance that the right duvet insert is a life changing purchase.

Cozy Earth is one of my favorite brands for sheets and duvet covers, so I decided to test two of their most popular duvet insert options head-to-head: the bamboo duvet insert, which I wanted to buy anyway before the summer started this year, and the down alternative duvet insert, which is one of the brand’s top-sellers.

Both comforters/inserts promise a great nights’ sleep, but after testing them (actually, after opening the boxes) I’ve found they’re completely different blankets. If you’ve deciding between the two, this one’s for you.

Cozy Earth Bamboo Duvet vs. Down Alternative Duvet: Similarities and Differences

There are some major differences between these two Cozy Earth blankets that, once I point out, will make it pretty clear which is right for you.

But they do have some similarities, so let’s start with those first:

• Both blankets are a great choice for those avoiding down for allergy or other reasons.
• Both are made to be used with a duvet cover, with loops for anchoring one in place so your cover doesn’t shift around all night.
• Both come in more than one warmth level, so you can choose based on climate and how hot or cold you sleep.
• Both are OEKO-TEX certified, meaning they’ve been tested free of harmful chemicals–a nice reassurance for something you’re spending so much time under.
• Both are designed to be temperature-regulating, so neither one is going to leave you sweating the way a cheap synthetic can (but one does feel warmer, in my opinions, and will share more, below!)

Now, the differences—this is where it gets easy to choose:

Loft. This is the big one, and you can see it clearly in the photo above. The down alternative is a high-loft, puffy blanket — the kind you want to snuggle under on a cold night. The bamboo insert has very little loft. It’s flat and drapey by design, which makes it ideal for warm sleepers who want to feel covered but cool, or as a lightweight layering piece over other bedding rather than your main source of coziness. We’ve used the bamboo duvet insert all summer and it’s been perfect. I, personally, would want something with a little more pouf in the winter.

Fill material. The down alternative is filled with Thermore’s synthetic down-alternative fill, made from 100% recycled polyester and engineered to mimic the warmth and airiness of real down without the allergens. The company is based out of Italy, and is literally dedicated to creating fill that’s as close to down as possible, and it really does deliver. The bamboo insert is filled with bamboo viscose, the same material as the shell, which is what gives it that cooler, more breathable, less-fluffy feel.

Shell material. The down alternative has a shell made from a cotton-polyester blend (roughly 60% cotton, 40% polyester). The bamboo insert is bamboo viscose inside and out, which is a big part of why it sleeps so cool and feels so silky against the skin. It’s so soft it’s tempting to use it without a duvet cover, though I personally use it with the Cozy Earth bamboo duvet cover.

Construction. The down alternative uses true baffle-box construction, individual sewn chambers that hold the fill in place and let it keep its plush, even loft. The bamboo insert is quilted, a flatter stitched design that suits its low-profile, layering-friendly blanket.

Care routines. One of the duvet inserts is easier to care for, and if that’s important to you, it’s worth knowing more about. Since this is a more detailed point, I’m going to give it its own section ….

Warranty and Care (They’re Not the Same)

Here’s something that surprised me and is worth knowing before you buy: these two inserts have identical warranties but different care routines, and it comes down to what’s inside them.

Both carry a 10-year warranty against pilling, workmanship defects and abnormal rips and tears (and here’s an important note most people miss: using a duvet cover extends that coverage to 15 years). The cover isn’t just for looks or to keep things clean, it’s a warranty requirement for the extended term. Both also come with the a 100-night sleep trial, so you can actually try either one in your own bed before committing.

Where they diverge is washing them,. The down alternative is the lower-maintenance of the two. Its recycled polyester Thermore fill handles laundering better, so you can machine wash and tumble dry it on gentle without much drama.

The bamboo insert is fussier. Because wet bamboo viscose clumps when it’s spun at high speed, Cozy Earth recommends either dry cleaning, or a rinse-cycle-only wash with no spin, then drying on low heat or hanging it. If you do machine dry either one, toss in a couple of wool dryer balls (or tennis balls) to keep the fill from clumping, and use a commercial-size washer and dryer if you can so there’s room for everything to move. I plan to just dry clean mine when needed to avoid ruining it.

What’s Better, the Cozy Earth Down Alternative Comforter or the Bamboo Comforter?

The answer really comes down to preference.

The down alternative is for anyone who loves the classic, plush, puffy comforter look and wants something to burrow under. This blanket is truly one of the most down-like and cozy down-alternative blankets I’ve tried. It’s also a better low-maintenance pick.

The bamboo insert is for hot sleepers, warmer climates or anyone who wants a cool, drapey layer instead of a heavy one, and don’t mind running to the dry cleaner once or twice a year.

At the end of the day (literally), you really can’t go wrong with either of these—they’re both beautifully made, and both earn their spot on a well-dressed bed. It just comes down to how you sleep and what you want out of the blanket.

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How I tested:

This seems obvious, but I’ll share it anyway: I slept with each blanket. The bamboo one I used all summer, and the down-alternative I tested under the AC for two weeks. I will likely return to the down alternative when the temps drop, as a shoulder blanket between the bamboo and my down comforter.