Casper Humidity Fighting Duvet Review

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If you tend to run hot at night, picking out bedding and sleep products can be difficult. You don’t want anything that’ll trap heat, and a lot of traditional materials do exactly that. Casper, best known for its bed-in-a-box mattresses, has tried to combat night time overheating with its Humidity Fighting Duvet

To find out if this duvet truly beats the heat and helps hot sleepers get better sleep, I tested it out for a few nights. In this review, I’ll go over what it’s made of, how it feels, and some pros and cons.

Just want the highlights? Skip to the end for my review summary.

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Casper Humidity Fighting Duvet
Casper Humidity Fighting Duvet
Casper Humidity Fighting Duvet

The Casper Duvet is covered in a soft and breathable cotton shell, which I found to offer good airflow through the fabric!

What is the Casper Humidity Fighting Duvet Made Of? 

The outer shell of this duvet is made from 100% cotton. Cotton is a great material that’s not only durable, but also breathable, which is perfect for a “humidity” fighting duvet. The outer cover is stitched in a chamber design to prevent the fill from bunching up. Basically, each stitched “chamber” contains some of the fill, so it can’t shift around inside the duvet. 

The chamber design on the Casper Humidity Fighting duvet.

The fill of this duvet includes two fill materials: a layer of merino wool and down fill. Merino wool gets its name from the Merino sheep it’s sheared from and it’s prized for its special properties, like being thermoregulating, moisture-wicking, quick drying, odor resistant, washable, and durable. And down fill is simply the soft, quill-less feathers from the underbelly or chest of a bird.

Additionally, this duvet features corner loops that allow you to attach a duvet cover if you want. However, this down duvet is completely machine washable, so you can use it as a duvet insert or use it as a down comforter and sleep right under it.

The full/queen size Casper Humidity Fighting duvet.

This Casper down duvet is available in midweight or lightweight options, which is just how much fill is used. The lightweight will have less fill than the midweight, so it’s a better option for hot sleepers or for use during warmer months. The duvet is also available in three different sizes: twin/twin XL, full/queen, and king/California king.

The Casper Humidity Fighting duvet is only available in one color option, which is white on one side and gray on the other. 

What Does the Casper Humidity Fighting Duvet Feel Like? 

Overall, the Casper Humidity Fighting Duvet feels super light and fluffy to me. It reminds me of the feel of a puffer jacket — because of the chamber design — but much with a much softer exterior, thanks to the cotton shell. Lying under the duvet, I thought it felt really airy and crisp, because the materials are lightweight and don’t trap heat. But it’s also soft and cushy, like a giant marshmallow blanket (minus the sugar and stickiness).

Feeling the Casper Humidity Fighting duvet.

Is the Casper Humidity Fighting Duvet Good for Hot Sleepers?

The whole purpose of this duvet is to prevent heat from being trapped, and it succeeds. The cotton cover allows for some breathability and airflow and the layer of merino wool helps with temperature regulation to prevent the duvet from absorbing and trapping your body heat. 

All of this makes me think that it’s a great option to keep hot sleepers from overheating year round. Or, if you aren’t a super hot sleeper, it could be a great duvet to pull out in the warmer (and sweatier) months.

The Casper Humidity Fighting duvet stays nice and cool.

How Durable is the Casper Humidity Fighting Duvet?

The Casper Humidity Fighting duvet.

Overall, I think this duvet feels quite durable. All of the materials are high-quality and sturdy, so it should be a long lasting product. The chamber design especially will help the duvet to keep an even fill distribution over time, even after washing. If you want to protect your duvet and keep it extra clean, I would recommend using a duvet cover, as well.

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Casper Humidity Fighting Duvet
Casper Humidity Fighting Duvet
Casper Humidity Fighting Duvet

The Casper Duvet is covered in a soft and breathable cotton shell, which I found to offer good airflow through the fabric!

Is the Casper Humidity Fighting Duvet Good for You? 

With all that in mind, let’s go over who I think should consider buying the Casper Humidity Fighting duvet, as well as some of the cons of the duvet. 

Who should try Casper Humidity Fighting Duvet

  • If you’re a hot sleeper, I think you’ll really love this duvet. Even if your body temperature is warm, this duvet stays cool and prevents heat from being trapped. I think the added layer of merino wool does a great job of keeping the temperature regulated, compared to other down duvets.
  • If easy cleaning is a priority for you, I think you’ll appreciate that this duvet is machine washable.
  • And if you’re looking for a high-quality duvet, this one won’t disappoint. Casper has used really excellent, durable materials to craft this cozy duvet.

Casper Humidity Fighting Duvet sheets complaints

  • If you’re a really cold sleeper and you’re looking for a comforter or duvet to keep you warm in the winter months, this one may not be the best option. It’s very light and keeps pretty cool, so it won’t do much to warm you up when it’s chilly.
  • If you’re a vegan or not interested in purchasing animal products, this duvet may not be the best option, as both the wool and down are sourced from animals. You might prefer a down alternative duvet. Casper does offer a down alternative duvet, which has a Tencel cover and is filled with recycled polyester.
  • Additionally, this duvet is definitely not a budget buy. Prices vary by size and weight, ranging from $309-$459. Considering the high-quality materials, the price makes sense, but it may not be the best option for shoppers on a stricter budget.

Casper Humidity Fighting Duvet Prices and Sizes

Curious how much this duvet costs? Here are the prices, broken down by size and weight. All prices are listed before discounts. Be sure to use our Casper coupon code to get the best price!

SizeWeightDimensionsPrice
Twin/Twin XLLightweight70" x 88"$309
Twin/Twin XLMidweight70" x 88"$359
Full/QueenLightweight90" x 94"$349
Full/QueenMidwweight90" x 94"$399
King/Cal KingLightweight108" x 94"$409
King/Cal KingMidweight108" x 94"$459
Save 10% with code SLEEPOPOLIS10
Casper Humidity Fighting Duvet
Casper Humidity Fighting Duvet
Casper Humidity Fighting Duvet

The Casper Duvet is covered in a soft and breathable cotton shell, which I found to offer good airflow through the fabric!

Casper Humidity Fighting Duvet Policies and FAQs

How does the Casper Humidity Fighting Duvet ship?

Casper offers free shipping within the contiguous United States and most of Canada. Customers in Hawaii, Alaska, the Yukon Territory, the Northwest Territory, and Nunavut will have to pay an additional shipping fee.

Does the Casper Humidity Fighting Duvet come with a sleep trial?

Yes, the Casper Humidity Fighting Duvet comes with a 30-night sleep trial, which means you can test it out for 30 nights and if you decide it’s not for you, you can return it within that trial period for a full refund.

Does the Casper Humidity Fighting Duvet come with a warranty?

It does — Casper offers a 1-year warranty on this duvet.

Is the Casper Humidity Fighting Duvet machine washable?

Yep, this duvet is machine washable. Casper recommends washing cold on a gentle cycle with like colors and tumbling dry on low.

Other Products from Casper

Finally, here are my star ratings for the Casper Humidity Fighting Duvet.

  • Materials
  • Comfort
  • Durability
  • Value
  • Cooling
  • Trial
  • Warranty
4.3
Amelia Jerden

Amelia Jerden

Amelia is a Staff Writer for Sleepopolis. She primarily covers bedding and sleep accessory products in reviews, how-to guides, and more. You can also find her over on the Sleepopolis YouTube channel. Amelia is a graduate of the University of North Carolina at Chapel Hill, with double majors in media and journalism and in dramatic art. Outside of work, Amelia can usually be found on a hike, traveling to a new city, or at her local thrift store.