Summary: What Is the Slumber Cloud Mattress Pad?
The Slumber Cloud Core Mattress Pad is a special kind of bedding made to help you sleep cooler at night. If you often feel hot while sleeping, wake up sweating, or live in a place where the summers are very warm, this pad can help you feel more comfortable in bed. It works by taking the heat your body creates and spreading it out so it doesn’t get trapped under you. This makes the bed feel cooler, even if the room is still warm.
Pros: What’s Good About It?
There are many good things about the Slumber Cloud mattress pad:
It helps your body stay cooler at night by removing some of the heat.
It’s made from high-quality materials that feel soft and last a long time.
It has stretchy sides that fit snugly on thick mattresses, even up to 20 inches deep.
You can use it on a mattress or even on top of a mattress topper.
It’s hypoallergenic, which means it’s good for people with allergies.
You can wash it in a machine using cold water.
They offer a 60-day return policy—even if you’ve already washed it—and a 180-day warranty.
Cons: What’s Not So Good?
Even though the pad has a lot of good features, there are a couple of things to keep in mind:
It doesn’t make your bed feel much softer, since the padding is not thick.
It won’t change the temperature of your room, but it can help cool the area right under your body.
First Impressions and What It Promises
The Slumber Cloud Core Mattress Pad says it can keep you cooler in bed by spreading out the heat your body gives off. It uses a smart fabric called Outlast Technology, which was first made for astronauts at NASA to help control body temperature. So, when I heard that, I was excited to try it.
I often get too hot at night, and cooling off while sleeping can be hard—especially in summer when there’s no air conditioner. I’ve tried many cooling pads and fans before. From my experience, no product is perfect, but the bedding you choose can really make a difference. That’s why I decided to try both the mattress pad and the matching pillow covers from Slumber Cloud.
Construction and Materials: What Is It Made Of?
When I first opened the package, I noticed it was labeled the “Nacreous Mattress Pad.” They have since changed the name to “Core Mattress Pad,” but the materials are the same.
The pad felt soft right away, and it looked like it was made to last. The outer layer is made of 60% cotton and 40% Outlast viscose, with a high thread count of 300, which makes it smooth and comfortable. Inside, it has polyester fiberfill and more of that Outlast material. It adds a little cushion—maybe about one inch in thickness.
One of the best features is the deep skirting with strong elastic. This makes it easy to stretch over your mattress, and it stays in place well. My bed is not very thick, but the pad still fit tightly and didn’t slide around.
How Does the Cooling Work?
Now, let’s talk about how this mattress pad actually keeps you cool. The secret is in something called “thermocules”. These are tiny beads inside the fabric, and they’re part of a special system called Outlast Technology.
Here’s how it works in a simple way:
When your body gets warm, these beads absorb the extra heat from your skin.
They store that heat away from you so you don’t feel hot.
Later in the night, if your body gets a little cooler, they gently release some heat back, so you stay comfortable.
It’s kind of like having a smart layer on your bed that always knows if you’re too warm or too cold—and adjusts itself for you!
I reached out to Slumber Cloud, and they explained it like this: the thermocules can change shape when the temperature changes. They go from solid to soft (like a gel) and back again. This helps them take in or give out heat depending on what your body needs.
More About Outlast Technology
Outlast Technology is a type of phase-change material, which means it can absorb, hold, and release heat depending on what your body needs. It was originally made for NASA to help astronauts stay comfortable in space.
The company describes it like ice in a drink. When ice melts, it absorbs heat and cools the drink down. In the same way, the mattress pad absorbs your body heat and helps you stay cooler longer. And unlike real ice, this “cooling” effect keeps working over and over again.
My Experience Using the Mattress Pad
🛏️ First Night Using the Slumber Cloud Pad
When the Slumber Cloud mattress pad arrived, it came neatly packed in a reusable plastic bag—which I appreciated, since it’s great for storing or traveling later. Right out of the bag, the pad looked high quality. The fabric felt soft and smooth, and the stitched panels gave it a well-finished look.
I placed it on my bed, and the deep elastic skirting stretched easily over my mattress. Once on, it stayed in place—no shifting, no bunching, just a snug, flat fit.
That night, I put a regular cotton sheet over it (because that’s how I normally sleep) and was curious if the cooling effect would still come through. It actually did. I noticed a slight coolness as soon as I lay down. The pad added just a touch of softness—not enough to change how the mattress feels, but enough to make it more comfortable.
The weather wasn’t super hot that night, but even so, I felt less warm than usual under my body. I still woke up once or twice (like I normally do), but I didn’t feel sticky or sweaty. So far, so good.
☀️ Putting It to the Test on Hot Nights
Of course, the real test came during the next few weeks when the weather got hotter and more humid—those nights when it feels like no fan is strong enough.
That’s when I really noticed how much of a difference this pad made. It didn’t cool the whole room or chill my entire body, but it did stop that hot, trapped feeling where my body was in contact with the mattress.
Usually, I end up tossing and turning, flipping my pillow, and moving around trying to find a “cool spot.” But with this pad, I stayed in one place longer. That helped me fall asleep faster—and stay asleep.
Even on the hottest, most uncomfortable nights, I didn’t wake up drenched in sweat. And honestly, just that made it worth it for me.
🌡️ A Small but Noticeable Difference
Let’s be clear: this mattress pad won’t magically cool down your whole room. That’s not what it’s made for. What it does do—and really well—is manage your body heat. It absorbs the extra warmth where you need it most, under your body.
I’ve tried a bunch of other “cooling” pads before, and none of them worked quite like this. The difference might seem small when you read about it, but if you’ve ever struggled to sleep because you’re too hot, you’ll know that even a small bit of relief can go a long way.
And that’s exactly what the Slumber Cloud mattress pad gave me—real relief from nighttime overheating.
The Pillow Covers
I also tried the matching Slumber Cloud pillow covers. They are made with the same Outlast fabric and felt really soft and smooth. The pillow covers have a 350 thread count and strong zippers, and they’re hypoallergenic—perfect for people like me with dust allergies.
I found the pillow covers very helpful. My head felt cooler at night, which made a big difference in how comfortable I felt. I liked them so much that I even took one with me on a recent trip.
Cleaning and Maintenance
Even though it uses advanced technology, the Slumber Cloud mattress pad is very easy to clean. You just wash it in cold water using your washing machine. Then you can tumble dry it on low heat and hang it to finish drying. That’s it!
Verdict: Final Thoughts on the Mattress Pad
Overall, I was really happy with the Slumber Cloud Core Mattress Pad and pillow covers. While it didn’t completely cool me down on the hottest nights, it did help enough to make sleeping more comfortable. It kept the area under me from getting too warm, which made a big difference.
If your bedroom is very hot, remember that no mattress pad can cool the whole room. But this one can definitely help manage your body heat better than regular bedding. I think it’s better than other cooling pads I’ve tried before, and it’s much better than just sleeping on a regular mattress.
With a 60-day money-back guarantee and free return shipping, it’s worth trying if you’re dealing with night sweats or overheating.
trying the Slumber Cloud comforter, mattress protector, and sheet set
After using the mattress pad for a while, I decided to try some of their other products too. In the photo, you can see all the items I used. They’ve since updated the names to make them simpler.
Dryline Mattress Protector
The mattress protector is also made with Outlast material and is 100% waterproof. This is useful if you sweat at night or want to protect your mattress from spills. I tested it by pouring some water on it, and it didn’t soak through. I think it might also add a small extra cooling layer, although it’s hard to tell exactly how much.
The Comforter
The lightweight comforter turned out to be one of my favorite products. It’s super soft and very light, which made it great to use even in warmer weather. On nights when I usually can’t use a blanket, this comforter was perfect because it didn’t trap heat like regular ones do. It still gave me that cozy feeling of having a cover without making me too warm.
The Cooling Sheet
The Stratus Cooling Sheet is made with soft cotton and Outlast technology. It feels smooth and light on the skin. While it doesn’t cool you actively, it’s definitely cooler than regular sheets. I found it comfortable enough to use even during a hot, humid summer in New York City.
Which Slumber Cloud Products Are Best for You?
Choosing What Works Best for You
Slumber Cloud makes several products that all aim to help you stay cool and comfortable while you sleep. But you don’t have to buy everything to get the benefits. Depending on your needs, some products might be better choices for you than others.
The Most Important: The Mattress Pad
If you’re someone who feels hot under your body at night or wakes up sweaty, the Core Mattress Pad is the best place to start. It’s the main item that really helps absorb your body heat and stop the sticky, uncomfortable feeling between you and your mattress.
It fits most mattresses well and stays in place. Plus, with its easy care and solid warranty, it’s a great investment to improve your sleep during warmer months.
Next Step: Cooling Pillow Covers
If you want a little extra cooling, especially if your head and neck tend to get warm, adding the pillow covers is a smart choice. They use the same cooling technology and feel soft and fresh.
These covers are also hypoallergenic and protect your pillows, making them a nice bonus for allergy sufferers.
For a Light Cover: Comforter or Cooling Sheets
If you like to have a blanket or sheet over you, the Lightweight Comforter or the Stratus Cooling Sheets are both good options.
The comforter is great for nights when you want a soft, light cover but don’t want to get too hot.
The cooling sheets feel smooth and breathable and are good if you prefer just a top sheet.
For Extra Protection: Dryline Mattress Protector
If you sweat a lot or want to protect your mattress from spills and dust, the Dryline Mattress Protector is worth adding. It’s waterproof but soft and helps with cooling a little bit too.
Final Advice
If you want the full cooling experience, the best option is to combine the mattress pad with pillow covers, and then add comforters or sheets based on what you like. But even just the mattress pad alone can make a big difference.
Remember, no bedding can cool the whole room, but Slumber Cloud’s products do a good job of managing your body heat, helping you feel more comfortable at night.