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The Sleep System

Kids Mattress + Free Pillow + Free Mattress Protector

$549.00 $749.00

The Sleep System

Kids Mattress + Free Pillow + Free Mattress Protector

Read our reviews from happy and satisfied customers!


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About The Sleep System Bed

The 5 little Monkeys’ sleep system bed has created the ideal sleeping environment for your child. Our sleep system includes a triple-layered mattress made using CertiPUR-US® certified memory foam, waterproof kids mattress protector, and custom fill pillow.

The kids mattress has cutting-edge temperature regulating technology to keep little bodies comfortable and cozy. The removable and washable mattress cover, made with organic cotton, ensures years of good sleep hygiene. For added protection and comfort, our waterproof mattress protector is made with soft organic jersey knit and comes alongside a custom filled pillow, which is anatomically correct for smaller bodies.

Customer Reviews

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Make Sweet Sleep More Than a Dream

Kids Bedding Designed to Address Issues That Keep Kids From Good Rest

The Sleep System
  • Toxin Free & Allergy Proof

    Our kids mattress is made from CertiPUR-US® certified foam, and the waterproof mattress protector creates a protective barrier from allergens so kids can breathe easy and rest peacefully.
  • Waterproof

    Growing up is a contact sport, and kids bedding shouldn't be fragile. Our waterproof, stain-resistant mattress protector and water-resistant toddler bed size cover mean accidents are always what they should be: no big deal.
  • Cradling Support

    Your child's body is growing, and it needs proper support to get the job done. Our mattress and pillow use a unique cradling technology to reduce restless movement and uncomfortable sleep positions, and the mattress's adaptive pressure relief ensures consistent weight distribution for better skeletal health.
  • Temperature Responsive

    Seasons change, but this kids mattress will keep your little one comfortable year-round. Our children’s mattress features an open-cell structure to enhance airflow and Dual Phase Change Gel technology that adapts according to a child's unique temperature regulation needs. That means little bodies stay comfortably balanced from head to toe – so your child sleeps soundly through the night whether it's summer, winter, spring, or fall in their toddler bed.
 Anatomy of the Perfect Bed
  • Kid-Customized

    • Ideal fill design for correct spinal alignment
    • Machine washable
    • Hypoallergenic
    • Cover made with organic cottons
  • Kid-Proof
    Mattress Protector

    • Waterproof & stain resistant
    • Securing bands for ease and durability
    • Machine washable
    • Hypoallergenic
    • Made with organic cotton jersey knit with non-toxic waterproof backing
  • Mattress for Kids

    • Cover is removable, machine washable, stain- and water-resistant. Made with OEKO-TEX ® certified, organic cotton fabric and a heavy duty zipper to withstand multiple washings.
    • 3-layer design promotes healthy skeletal alignment, comfort cradling, and temperature regulation
    • High-density, open-cell memory foam for the perfect balance of support, softness, and breathability
    • Dual Phase Change Gel adapts to your child's body temperature by absorbing and channeling heat away, keeping the children’s mattress at a comfortable temperature so your little one can sleep soundly.
  • Perfectly Sized & Ideally Safe
    for Toddlers, Kids & Teens

    • Twin Size: 39” × 75” × 8”
    • Full Size: 54” × 75” × 8”
    • Queen Size: 60" x 80" x 8"
    • 8” low profile height is ideal for platform beds, daybeds, trundles and bunk beds.

A Kids Mattress Built for Lasting Comfort

  • • Machine washable, stain- and water-resistant cover with heavy duty zipper
  • • Kids mattress cover made with organic cotton
  • • Comfort layer with cradling open-cell memory foam and Dual Phase Change Gel
  • • Pressure-adaptive support layer
  • • Highly durable base layer
  • • Made in the USA
  • • Mattress cover made of OEKOTEX ® Certified Fabric
A Kids Mattress Built for Lasting Comfort

A Pillow Created for Good Posture & Peaceful Rest

  • • Custom fill for the correct spinal alignment of smaller bodies
  • • Fits standard size pillowcase
  • • Hypoallergenic
  • • Cover made with organic cotton
A Pillow Created for Good Posture & Peaceful Rest

A Mattress Protector Made With Kids in Mind

  • • Waterproof & stain-resistant
  • • Machine washable
  • • Oversized bands for ease and durability
  • • Hypoallergenic
  • • Made with organic cotton jersey knit with non-toxic waterproof backing
A Mattress Protector Made With Kids in Mind

Take the 100-Night Rest Test on Our Sleep System Bed - Risk Free!

We guarantee you and your little one will love the 5 Little Monkeys Sleep System bed. So confident, in fact, that we encourage you to try it for 100 nights risk-free. If you don't fall in love with it, we'll give you a full refund, no questions asked.
100-Night Rest Test
15-Year Mattress Warranty
Ships in 24 Hours
Free Shipping & Returns

What the Experts Think

"When it comes to the transition from crib to big kid bed–the better the tools, the smoother the journey. 5 Little Monkeys is one of the most indispensable tools you can have as you head out."
"As a Family Sleep Specialist, I know the importance of a quality sleep surface for a child. Up until finding the 5 Little Monkeys Sleep System, I did not have a specific mattress I could recommend to my clients looking to purchase their child’s first big kid bed mattress. All of the mattresses available were adult mattresses being sold for children. The 5 Little Monkeys Sleep System is unique in that it was developed specifically for a child’s growing body. The creators, veterans in the mattress business, constructed the mattress with the developmentally appropriate support, durability, temperature regulation, and organic materials, for a children’s mattress. As an added value, the mattress also comes with a waterproof and washable mattress protector (priceless for those “accidents do happen” nights), a child size pillow, and an adorable stuffed monkey that the kids will love. I work with so many families during the crib to bed transition, which is often a stressful time. I am so happy that I now have the perfect mattress system to recommend to my clients."
"Children need a good mattress and cozy sleep space as much as any adult. I recommend 5 Little Monkeys. Once your child is ready for a “big kid” bed, get them one that even you would want to sleep in...and maybe you won’t have to!"

Order the Perfect Children’s Mattress Today!

Give your child the gift of unbeatable sleep throughout their childhood. Our Sleep System bed is the perfect transition from the crib to a toddler size bed and can be used throughout childhood and teen years. Order your 5 Little Monkeys kids mattress today!

Get Better Sleep Today