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If you’ve ever found yourself throwing the covers off at night, or need to constantly change positions from being too hot, you may want to consider bedding that keeps you cooler at night. Many companies that market cooling bedding use cotton material, lower thread counts, and moisture-wicking technology.

Slumber Cloud bedding helps regulate your sleeping temperature by absorbing and releasing heat while you sleep. How do their products actually stack up? We reviewed some Slumber Cloud bestsellers to tell you how.

Slumber Cloud began in 2013 in Colorado. They designed their products for “thermally incompatible” couples.

Slumber Cloud makes their products with Outlast, a temperature-regulating technology approved by the National Aeronautics and Space Administration (NASA). Using Outlast, their bedding and loungewear absorb your body heat while you sleep and release warmth back to you as your temperature decreases. You don’t necessarily have to be a hot sleeper to get the full benefits of what they have to offer.

Slumber Cloud offers a variety of bedding options including comforters, mattress pads, sheets, and pillows. They also offer loungewear, laundry products, and throws.


  • free shipping and returns
  • 180-day warranty
  • hypoallergenic and machine washable
  • keeps your body temperature regulated so you don’t sweat
  • excellent customer support


  • not 100 percent all-natural sheets
  • more pricey than other bedding
  • limited colors available
  • mild odor upon opening that goes away with laundering
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Slumber Cloud is for anyone going through different life stages. Whether you’re buying your first home, getting new bedding for moving in with a partner, or going through menopause, Slumber Cloud products are great for both hot and cold sleepers.

Slumber Cloud bedding absorbs and stores excess heat. If you get too cold, it will release heat back to you so you stay in a comfortable, consistent temperature range all night.

The company says their products are best for “thermally incompatible” couples, with one partner who sleeps hot and one partner who sleeps cooler. They’re also a great fit for those who wake up with night sweats, tend to get too warm while sleeping, or want the feel of cotton sheets and a lightweight comforter.

Slumber Cloud doesn’t just sell bedding, but it’s what they’re best known for. They are Standard 100 by OEKO-TEX certified, but not organic. Their bedding and loungewear use the same temperature regulation technology that NASA uses for their spacesuits.

They have multiple options for bedding, including mattress pads, comforters, and sheets. That means you can build your bed, stacking cooling bedding for a wonderful night’s sleep.


Comforters and covers

Slumber Cloud offers five different comforters:

The most popular product is their Lightweight Comforter, which the company describes as “your everyday comforter.” It uses premium cotton and ClimaDry by Outlast fiberfill. We loved how soft it felt and how nicely it draped over a bed. The comforter is lightweight, so it keeps you cool even if you’re sleeping in a warmer room.

It uses unique fibers to hold on to your body heat before releasing it again to warm you back up. We thought this comforter was cool enough to sleep comfortably. In hotter summer months, it may still be too warm to use, but we thought for a comforter, it was extremely light and airy.

Sheets and covers

Slumber Cloud offers sheet sets, duvets, and pillow covers.Their bestselling sheets are the Essential Sheet Set, which comes in eight colors with a flat sheet, fitted sheet, and two pillowcases. Twin sheet sets come with one pillowcase. The sheets are 300 thread count with 60 percent cotton and 40 percent Outlast viscose. Lower thread count might seem lower quality, but this is what helps make sheets more breathable.

While the sheets are sold in sets, their pillowcases are sold individually. The sateen weave gives the sheets a soft feel with the Outlast technology and viscose material. We thought it was like sleeping in a luxury hotel with the initial coolness when first getting in bed. It’s not meant to stay cool all night, but rather to keep you from overheating and sweating.

We were pleasantly surprised when, once the coolness went away, we didn’t feel warm or cold, just more neutral.


Slumber Cloud offers two pillows: the UltraCool pillow and the Core Down Alternative pillow. The UltraCool pillow feels slightly cooler than the Core Down Alternative. We loved how there is little need to flip the pillow during the night because both sides stay cool. Just like their other bedding, the pillow uses Outlast and is filled with Polysilk down-alternative fiberfill. We thought it was plush without being too bulky.

Mattress pads and protectors

There are three mattress pads offered by Slumber Cloud: the Essential, Core, and Performance pads. Each becomes gradually cooler to sleep on, but all use the Outlast technology for temperature regulation.

The Performance Mattress Pad is their coolest option. It’s made of the same Outlast technology as their other bedding and fits mattresses up to 20 inches. We noticed the mattress pad didn’t seem to collect body heat as other pads typically do, and there was no noise from shifting around on the pad.

The filling is 100 percent polyester and hypoallergenic, but it wasn’t as thick as some others. The company says the comfort doesn’t come from the thickness of the pad but from your sleeping temperature. We noticed the pad gave a bit more padding, but it was the temperature regulation that made it extremely comfortable to sleep on.

The Core Mattress Protector is a soft, waterproof fabric that can protect your mattress from spills. It’s not as cool as the Performance Mattress Pad. But if you deal with night sweats, you can be reassured your mattress is protected from moisture.


Slumber Cloud sells loungewear for both men and women. They use the same NASA-engineered technology as their bedding products, only it’s applied differently for their clothing. This means they’re comfortable enough to sleep in, but stylish, so you can actually leave the house wearing them.

Slumber Cloud doesn’t sell pants, but they have a variety of tops from long-sleeved to tanks. Their STAY-COOL sleepwear products use Nattcool technology that is moisture-wicking and eight times more breathable than cotton.

Home and body

  • Laundry products. Slumber Cloud sells their Free & Clear Laundry Pods, reusable wool dryer balls, and Tom & Sheri’s Iron in a Bottle, which is a plant-based wrinkle-release spray. They work great for washing your Slumber Cloud bedding or loungewear.
  • Silk sleep mask. This sleep mask contains temperature-regulating lining and can also be sold along with the silk pillowcase. The silk pillowcase is made to fit over your current pillow and protects your skin and hair from damage caused by friction, including split ends.
  • Plush throw blanket. This throw blanket uses ClimaDry fiberfill for temperature regulation. It contains microfiber on one side and brushed flannel on the other for a soft and durable blanket.

Customer reviews are overwhelmingly positive. Users say the bedding is soft and comfortable, with a good drape over their beds. One user says, “I am quite possibly the pickiest person on earth about my sheets. These are the best out there!”

Some reviewers say the lightweight comforter still made them too hot or was too thin. A few complain of wear and tear in the comforters after a few washes.

Most users seem satisfied with Slumber Cloud customer service, but some say the free return shipping was not honored.

Most cooling or temperature-regulating bedding on the marketplace is actually moisture-wicking. That means it’s not going to cool you down or manage your temperature until you’ve built up sweat and moisture, which will then wick it away.

Slumber Cloud takes a proactive approach: They don’t want you to have to build up sweat and moisture for the bedding to work for you. So it consistently adjusts to your temperature, and you never get to the point where you’re sweating to begin with.

How does Slumber Cloud compare with their competitors? First of all, we appreciated that Slumber Cloud bedding is machine washable. The Breeze Comforter from Buffy uses eucalyptus to regulate body temperature, but it’s not machine washable.

And when it comes to cooling, Slumber Cloud comes out on top. For example, the Saatva Organic Sateen Sheet Set is 100 percent organic and uses all cotton and a thread count of 300. Slumber Cloud sheet sets take it a step further with their Outlast technology to regulate temperature. It’s a bit more pricey than other cooling bedding, but Slumber Cloud also offers a wide range of cooling products so you can build a great bed.

Mattress pads were the core Slumber Cloud product and what the brand became known for. More recently, the company has seen their Lightweight Comforter rise in popularity. It’s now their bestseller.

If you’re on the fence about purchasing new bedding and want something lightweight and cool, consider trying out the Lightweight Comforter. A mattress pad or protector is also a good choice to help you sleep cooler while lying on top of it.

How do you care for your Slumber Cloud bedding?

It’s best to follow the instructions on your bedding. The company recommends washing in cold water to preserve the technology. If the bedding or loungewear is continuously exposed to high heat, the technology will break down over time. This is because it’s absorbing so much more heat than your body would.

It’s okay if you need to wash your Slumber Cloud bedding on hot every once in a while. Accidents happen!

What is Slumber Cloud’s shipping policy?

Shipping is free in the United States. As long as a product is in stock, it will usually ship out within 24 hours of ordering. If you need to return your product, they offer free return shipping in the United States. If you place your order through a third-party vendor, you will need to pay to return the product back.

Does Slumber Cloud offer a warranty?

You have 60 nights to try out Slumber Cloud products, along with a 180-day warranty for any defects, which includes how it fits and the stitching. However, the warranty does not cover the temperature performance and damage caused by improper care and laundering.

Slumber Cloud is a great fit for those who sleep hotter or for couples who prefer different temperatures while they sleep. Using Outlast technology, Slumber Cloud bedding options regulate your sleeping temperatures, so you can sleep more comfortably.

They offer a range of products, including comforters, sheet sets, mattress pads, loungewear, and laundry products. Slumber Cloud has plenty of positive reviews, provides helpful customer service, and offers a 180-day warranty on their products. We thought it was worth it, especially for people who overheat at night and want a change.

Risa Kerslake is a registered nurse, freelance writer, and mom of two from the Midwest. She specializes in topics related to women’s health, mental health, oncology, postpartum, and fertility content. She enjoys collecting coffee mugs, crocheting, and attempting to write her memoir. Read more about her work at herwebsite.