Casper Humidity Fighting Duvet Review – Great For Hot Sleepers?

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It feels great to snuggle up under a big fluffy comforter on a chilly winter night; it’s like sleeping under an insulating cloud. What about when it’s not so chilly? What about when the days get longer and, no matter how low the AC set, it’s just impossible to sleep under a comforter without waking up hot and drenched in sweat?

Well, those hot sleepers out there should definitely take a look at the Casper Humidity Fighting Duvet – it’s in the name for crying out loud. Humidity. Fighting. The Casper contains some interesting materials that are designed to wick moisture away from the body and dissipate heat.

As a person who regularly struggles with sleeping hot, I was interested to see how the Casper would work for me; read on for my full Casper Humidity Fighting Duvet review!

Note: The terms “duvet” and “comforter” are sometimes used interchangeably. Because the Casper has the construction and design of a classic comforter, I will often be referring to it as a “comforter” in this article. Make sure to check out our article on the differences between duvets and comforters

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

The Casper Humidity Fighting Duvet is a great option for hot sleepers who want to stay cool at night. Click the link to save 10% on a Casper Duvet.


The Casper Humidity Fighting Duvet Might Work For …

  • Sleepers who overheat at night. Sleeping hot can be a regular occurrence when using a comforter, but this shouldn’t be the case with the Casper. It features breathable cotton in its outer shell that is cool to the touch, as well as a layer of moisture-wicking merino wool. Most people should not be sweating or overheating underneath this cooling comforter.
  • Those who need something that works as both a comforter and duvet insert. The great thing about the Casper is that it can be utilized as both a comforter and a duvet insert. By itself, it works well as a cooling comforter with a smooth outer shell. People who want a different look or feel can throw the Casper inside a duvet cover and secure it with its corner duvet tabs.
  • People who are seeking a high-quality comforter. The Casper contains high-end materials and boasts a very durable construction. It features responsibly-sourced duck down, a layer of merino wool, and a 100% cotton outer shell, so those who want something higher-end should check it out.

Casper Humidity Fighting Duvet Construction

The Casper Humidity Fighting Duvet Might Not Work For …

  • Those who want a more budget-friendly comforter. The Casper is a luxury comforter and, being such, it comes with a higher price tag. It is currently priced at around $390 for a Full/Queen size, so it might be too pricey for some shoppers. It has a lot to offer hot sleepers, but there are more affordable down comforters on the market.
  • People who want to avoid down for any reason. Some people with allergies don’t like down because it exacerbates their symptoms, and some just find down to be unethical. Whatever the reason, the Casper contains duck down and these people should look for a down alternative comforter.
  • Colder nights. The Casper is really made with hot sleepers in mind, and it isn’t a very warm and insulating comforter. Those who need a heavy, warm comforter to use during the winter months might need to look elsewhere.

Casper Humidity Fighting Duvet Sewn Through Design

Casper Humidity Fighting Duvet Construction

  • The Casper is available in three sizes: Twin/Twin XL, Full/Queen, and King/California King.
  • The outer shell of the Casper is made of 100% cotton. The comforter is flippable, and one side is beige while the other is white.
  • The comforter features a sewn-through design where the fill is held in place in rectangular boxes.
  • The Casper contains ethically-sourced duck down and a layer of merino wool.
  • There are duvet tabs at all four corners of the Casper, making it easy to tie it within a duvet cover.
  • According to Casper, the comforter can be machine washed on a cold setting and dried on a low setting.
Save 10%
Casper Humidity Fighting Duvet
Casper Humidity Fighting Duvet
Casper Humidity Fighting Duvet

The Casper Humidity Fighting Duvet is a great option for hot sleepers who want to stay cool at night. Click the link to save 10% on a Casper Duvet.

Casper Humidity Fighting Duvet Tag

Casper Feel And Loft

Starting with the outer shell, the comforter is quite soft to the touch. The cotton is pretty smooth and it feels nice and cool against my skin. I will note that the shell is somewhat crinkly; moving around underneath the Casper, it does make some noise. It wasn’t loud enough to wake me up, but it is worth mentioning.

As I mentioned above, the Casper can be easily paired with a duvet cover because of its four corner tabs. Adding a soft cotton duvet cover to the Casper does cut down on the sound somewhat, but it might affect the comforter’s ability to wick moisture away from the body.

The Casper is not an extremely heavy comforter, but it does have a decent amount of loft; just looking at the comforter from the side, it is quite fluffy and rises off the bed. However, since it is a lighter comforter, it really doesn’t offer that cloud-like experience some people expect from down.

RELATED: Best Comforters

Casper Warmth And Breathability

Temperature-regulation is the primary feature of the Casper, but how well does it work? Well, I can say it works great. Climbing underneath the comforter, the Casper felt cool against my skin. As I lay there a bit longer, I could feel the comforter breathing and letting the air in my bedroom pass through.

Casper Humidity Fighting Duvet - Side Sleeping

Now, while I could not actually feel the comforter wicking moisture away from my body, I did not wake up in the middle of the night with sweat on my body. In addition, I did not wake up having kicked off the Casper, something I often do with warmer comforters. All signs point to me sleeping through the night with no disturbances.

However, using the Casper on a colder night, the comforter was not the best match, and I could feel too much cool air moving through the comforter. Also, being a lighter comforter, I just wasn’t getting that much insulation from the down.

Final Thoughts

The Casper Humidity Fighting Duvet really is an effective option for hot sleepers who often wake up covered in sweat. I am a hot sleeper, and I slept well on the warmer nights with no real issues. However, those who want to save some money or require a comforter for colder nights, but need to keep looking.

The Casper comes with a 100-night sleep trial and 1-year warranty. Of course, Casper offers many other products such as the popular Casper mattress.


How much does the Casper Humidity Fighting Duvet cost?

The duvet ranges in price from $350 for a Twin/Twin XL up to $450 for a King/California King.

Does the Casper Humidity Fighting Duvet sleep hot?

The Casper Humidity Fighting Duvet does not sleep too hot. It features a breathable outer shell and a layer of merino wool that will draw heat away from the body and wicks moisture as well.

How fluffy is the Casper Humidity Fighting Duvet?

The Casper Humidity Fighting Duvet is decently fluffy; it features duck down with good fill power. However, it is not a heavy comforter with tons of down, so it is not really a big fluffy cloud.

What is the difference between a duvet and a comforter?

While the terms are used interchangeably, there are some clear differences between duvets and comforters. A duvet is really two pieces: a duvet insert and a duvet cover, while a comforter is simply one piece. Where it gets confusing is how a comforter can act as a duvet insert and is sometimes referred to as such.

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Marten Carlson

Marten is Senior Editor at Mattress Clarity. He covers the mattress industry as well as sleep science news. He is specifically interested in the connection between sleep and overall health. Marten has written for media publications like Consequence of Sound and received a master’s degree in Film Studies from Emory University. He comes from Franklin, Indiana, and spends all the time he can writing, directing, and acting in films. He has directed genre short films and features. His newest film, Starlets, recently premiered at the River Town Film Festival in Clinton, NJ. He also stars in the upcoming thriller, Sour Bear. His next film, At The Hop, is a hot rod actioner with a horror twist.