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Core Mattress Protector - Crib - Final Sale FINAL SALE

Keep your baby's mattress protected and cool with our Core Crib Mattress Protector. Designed with comfort and protection in mind, this protector is made with advanced Outlast® temperature regulating technology that helps regulate your baby's body temperature and prevents heat buildup. The quiet waterproof fabric layer shields the mattress from liquids and germs, ensuring it stays clean and new. Your baby will sleep in space-aged comfort and temperature control, giving you peace of mind. Get the Core Crib Mattress Protector today and protect your baby's mattress while ensuring comfort.

Final Sale items are not eligible for return, exchange, or the 60-night trial period.



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Size Dimensions
One Size 27.5" x 52" x 10”

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Rest easy knowing the baby's mattress is protected. Our Crib Core Mattress Protector's soft, stretchy, HDPE / polyester knit cover lets the baby settle into the mattress without any unnecessary noise or ruffling. Outlast® Xelerate™ temperature regulating fabric absorbs, stores, and releases heat as the temperature in the crib changes.

Slumber Cloud Icon Waterproof100% waterproof protection preserves your mattress and extends its lifespan

Slumber Cloud Icon Fabric FibersOutlast® Xelerate™ fabric absorbs, stores, and releases heat then spreads excess absorbed heat out from under your baby's body so they sleep at the perfect temperature

Slumber Cloud Icon Oeko-TexOeko-Tex Standard 100 Certified Technology

Why we're different.

Traditional bedding and moisture wicking technologies react to changes in your body temperature while you sleep. Slumber Cloud is doing something different. Slumber Cloud Bedding utilizes Outlast® technology for an unmatched approach to temperature regulation. Outlast® technology is proactive, not reactive. As your body temperature increases during sleep, Outlast® technology stores that heat to keep you cool, and then releases it as you cool down...keeping you feeling “just right”.

Infographic image of how Outlast Technologies temperature regulation works. Creating a comfort zone to help prevent you from being too hot or too cold.

Our premium lining fabric takes a proactive approach by employing active temperature control properties, versus other "cooling" bedding that is moisture-wicking and simply reactive.

Close up image of the Slumber Cloud Core Mattress Protector outer material

Outlast® materials improve comfort for: Anyone looking for a more comfortable night’s sleep - they’ll sleep cooler and more comfortably. Sleepers who struggle with hot flashes and night sweats - proactive temperature regulation means they’ll sleep cooler and drier and wake up feeling refreshed. Thermally incompatible couples - individuals can sleep at their own ideal temperature.

A view of a child’s crib from above with the Slumber Cloud Core Mattress Protector - Crib

We pass on everything we learn to our customers. From sleep studies to new technologies, we want to help you make informed decisions about your sleep.

Click to learn more about our studies: Heat Sleep Study Humidity Sleep Study

A young child smiling and standing in her crib with the Slumber Cloud Core Mattress Protector - Crib

The thoughtfulness is in the details.

It doesn’t stop at thread count. It’s the little things, the thoughtful details, that make our products the best available.

HDPE / Polyester Blend

A HDPE / polyester blend cover provides soft and durable yet silent comfort

Up to 10” of Depth

Fits any mattress up to 10”

Easy to Care For

Just throw it in your home washing machine

Most frequently asked questions.

How does the technology in the bedding work?

Outlast® technology is made of a unique material that can absorb, store and release excess heat. As an individual’s skin temperature increases, the technology will absorb that excess heat to help reduce overheating. The material will store the excess heat until the skin temperature begins to drop. When this occurs, the stored heat is released back to the individual to prevent chill. By managing the build-up of heat and moisture under the covers, Outlast® technology helps keep you at a comfortable temperature so you sleep “just right.”

Is this machine washable?

Yes! Just like traditional bedding, Slumber Cloud products are designed to be washed and dried in your home washer and dryer. Please carefully follow the care instructions on the tag of your products.

How do I sanitize my bedding?

Although we recommend against using high heat when washing your bedding there are products that can help with sanitizing your bedding. Here are a few of our favorites: Dropps & Tide

How should I remove stains?

Please refrain from using harsh chemicals such as bleach and oxiclean on your bedding. Instead opt for more natural alternatives such as a small amount of dish soap, a warm water & vinegar solution, or specialty formulated laundry detergent such as Dropps

How do I wash my mattress protector?

To wash your mattress protector, please follow the washing instructions on the tag. If you have cut your tags after purchase, then it is recommended to wash with Slumber Cloud Free & Clear Laundry Detergent or a mild detergent in cold water on a delicate spin cycle. When it’s time to dry your mattress protector, please dry it on low heat or air dry. Do not iron your mattress protector. To reduce wrinkling, take your mattress protector out of the dryer and immediately place it on your bed or use a wrinkle release spray such as Iron In a Bottle for that crisp and finished look.

Does Free Shipping Apply To International Orders?

Free shipping is only valid for US and Armed Forces delivery addresses. However, we do offer discounted shipping rates to Canada addresses.

Do you ship internationally?

Currently, we only ship internationally to Canada. At the time of purchase we include the cost of shipping, taxes, and duties for Canadian shipments. No additional fees will incur at delivery, but if they do please contact our customer service team at to take care of the issue. For all other countries, if you find a forwarder or have a friend or family member here in the states, we would be more than happy to work with you to get it there.

Can I still return an item even if it's been washed?

We accept returns in any condition within 60 days of purchase! We want you to absolutely love your new bedding, so if you wash an item, try it out, and decide it's just not for you, we can definitely still initiate a return. Please note we do our very best to donate all returns to local charities instead of a landfill. We appreciate your help in this process by washing any used items before returning them to us.

Are shipping fees covered for returns?

All shipping fees for domestic returns are completely free! When you initiate a return through our returns platform, you will receive a prepaid shipping label to get the item back to us. If you live outside the US and are looking to initiate a return, please check out the return policy in the International FAQs.

How do I initiate a return?

If you're looking to initiate a return, just head over to our returns page! Please note that we are not able to process returns for items listed as Final Sale or past the 60 day return period.

What is your return policy?

Bedding: All bedding products, excluding “Final Sale” items, come with a 60-Day Satisfaction Guarantee. Sleep on it, wash it, and really test it out - If you are not fully satisfied with your new bedding you can return the item(s) within 60 days of your purchase date, no questions asked. A refund will be issued, within 7 business days of receiving the returned product.

Final Sale: Final Sale are not eligible for return, exchange, or the 60 night trial period.

Apparel & Home: Items in new and unopened condition are eligible for a return or exchange within 60 days of purchase. In the event of a return or exchange, our team will inspect the item and if determined it is new, a refund or exchange will be issued within 7 business days of receipt. If the item is in used condition, missing tags, or has been removed from the packaging, the return or exchange will be voided and the product donated to a local charity.

Are your products covered by a warranty?

Yes! All of our products are covered not only by the 60 night trial period but also a 180 day warranty which covers manufacturers defects (i.e. stitching, sizing). Please note in addition to damage caused by disregard of care instructions, temperature performance is not considered a manufacturers defect or covered by the product warranty.

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Free Shipping & Returns

All U.S. orders are shipped right to your door, free of charge.

Try it For 60 Nights

Sleep on it, wash it, and really put it to the test for two whole months! If you don’t love your new bedding, just return it for a full refund. No questions asked!

It’s bedding that keeps you warm but also cool, which sounds like magic but is just science.