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Home » Mattresses » 5 Little Monkeys Mattress Review (Pros and Cons)

5 Little Monkeys Mattress Review (Pros and Cons)

2 kids on a 5 little monkeys mattress

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How we generated this voice

Finding a kids mattress that ticks all the boxes is daunting. Shopping for a new mattress for yourself is already stressful enough. Buying one for your kid, on the other hand, is a downright nightmare. For this 5 Little Monkeys mattress review, we spent countless hours testing the 5 Little Monkeys Sleep System – a mattress designed specifically for children. Read on for our honest opinion.

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5 Little Monkeys Mattress Review

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5 little monkeys sleep system
5 Little Monkeys


  • Comes in a full sleep system with custom fill pillow and mattress protector
  • Suitable for all sleeping positions
  • Cooling
  • Pressure-relieving


  • Not for extremely overweight children
  • Slight off-gassing

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Our experience with the 5 Little Monkeys Mattress

Growing bones need a bit more care when it comes to sleep and sleep posture. While the ideal sleep posture is one wherein the spine is perfectly aligned, we all know children sleep like pretzels.

A memory foam mattress like the 5 Little Monkeys mattress can help provide proper spinal alignment while also offering good pressure relief. Memory foam mattresses are known to contour around the body, essentially creating cradling support which is excellent for growing children. They are, however, notorious for trapping and channeling heat.

The 5 Little Monkeys mattress has 3 layers of CertiPUR-US certified memory foam that features a unique temperature-regulating technology that helps wick heat away from the mattress. This makes the perfect mattress for kids who tend to sleep hot because it allows them to sleep at the optimum sleep temperature.

The top comfort layer contains a dual phase change gel that helps keep body temperature even. The dual phase change gel memory foam in the 5 Little Monkeys mattress is exclusive to 5 Little Monkeys. Both the top layer and transition layer feature an open-cell structure that allows both heat and moisture to escape. This helps keep the mattress stay even cooler while keeping it dry and fresh for longer. This also helps create a more responsive memory foam while still retaining a soft feel. The base layer also acts as the support layer and is made from denser polyfoam that helps keep all the layers together while providing a sturdy base.

Contrary to what some people might think, a kids’ mattress should be a medium rather than a medium-firm on the mattress firmness scale. It should be neither too firm nor too soft. The 5 Little Monkeys mattress is a 5-5.5 on the scale, keeping it at a happy medium. It’s suitable for all sleeper types, including strict side sleepers and stomach sleepers. No matter what position your child may sleep on, they still get pressure-relieving comfort on the 5 Little Monkeys mattress.

The only caveat to an all-foam mattress is that it may feel too soft for a child that’s severely overweight. We suggest looking into hybrid mattresses if your child is on the heavier side. It is also important to note that the 5 Little Monkeys mattress is not a bed that’s meant to be shared.

CertiPUR-US certified mattresses like the 5 Little Monkey mattress means the mattress foam used is completely free from toxins and heavy metals that can be dangerous to your little one’s health.

The 5 Little Monkeys mattress also comes encased in a mattress cover that’s made from 100% pure, organic cotton that’s both breathable and moisture-wicking. The organic cotton mattress cover can be removed and machine-washed, which is crucial especially for a kid’s mattress. It also features a heavy-duty zipper, which we found could endure multiple washings with no problems whatsoever. The mattress cover is also OKEO-TEX certified and we found it to be allergy-proof.

Now, the 5 Little Monkeys Sleep system includes a waterproof mattress protector and a custom fill pillow, aside from the mattress. We really like that they include a mattress protector because it is one of the most important things that can help keep your new mattress stay fresher for longer while also helping to extend its lifespan. The fact that it is waterproof is also a big help when it comes to the inevitable spills and accidents.

The Sleep system also includes a custom-filled pillow that can be filled with the ideal fill depending on your child’s age, sleeping position and weight. It is hypoallergenic and also comes encased with the same breathable organic cotton cover as the mattress. It is also removable and machine-washable. It also comes with a free cute stuffed monkey.

Like other foam mattresses, we did experience a tiny bit of off-gassing upon first unboxing the 5 Little Monkeys mattress but it did dissipate within 24 hours. We suggest airing out your child’s new mattress in a well-ventilated room prior to first use.


The 5 Little Monkeys mattress comes in three kid-friendly sizes. It measures 8″ in thickness which is the ideal low profile height that’s suitable for platform beds, daybeds, trundle beds and bunk beds. It is not compatible with an adjustable bed base.

  • Twin
  • Full
  • Queen


The 5 Little Monkeys mattress comes with a risk-free 100 day sleep trial with a full refund. It also comes backed by a 15 year warranty. 5 Little Monkeys also offers free shipping within the continental United States and they ship the mattress within 24 hours. They also help dispose of your old mattress for a minimal fee.

Buy: 5 Little Monkeys Mattress

Why a good night’s sleep is crucial for a child’s growth

Ever wonder why babies sleep so much? Scientific studies have shown that infants require up to 16 hours of sleep daily. This is because growth and development happens during sleep. As a child grows older, the number of hours decrease by twos up until they are 18 years of age where the recommended number of hours stays at 8 and stays at 8 hours all through adulthood.

Even as adults, recovery and repair still only happens during sleep. Lack of sleep can be detrimental to the health of a person, oftentimes causing a whole host of long term issues. In children, lack of sleep can lead to growth and developmental problems from behaviorial to mental and physical health.

Choosing the right mattress as well as an ideal sleeping environment is conducive to better sleep health.


What kind of mattress should a 5 year old sleep on?

A 5 year old child should sleep on a mattress that’s both pressure-relieving and supportive, while also helping enhance proper spinal health and growth.

Is 5 Little Monkeys mattress toxic?

The 5 Little Monkeys mattress is non-toxic and is certified by both CertiPUR-US, Proposition 65, CPSIA and OKEO-TEX, among a few more. A full list of certifications is available on their website.

What are the dimensions of the 5 Little Monkeys mattress?

The twin size measures 39″x 75″x 8″, full measures 54″x 75″ x 8″ and the queen measures 60″ x 80″ x 8″.

Where is 5 Little Monkeys made?

5 Little Monkeys mattresses and bedding products are all made in the USA.

About 5 Little Monkeys

It was the search for the perfect balance between comfort and support specifically for growing kids that spurred the birth of 5 Little Monkeys mattress. Coming from a long line of bedmakers in California, the founder of 5 Little Monkeys was inspired by his 2 daughters to create the perfect mattress for children.

Contact 5 Little Monkeys


5 Little Monkeys created a complete system made especially for kids aged 3-18. Made with proprietary blend memory foam that is temperature regulating, the 5 Little Monkeys mattress provides the right amount of comfort and support which makes it the best mattress for growing bodies. The 5 Little Monkeys mattress cost is relatively inexpensive considering you will be getting their entire 5 Little Monkeys Sleep system.

Next step: You’ve read the review. Now it’s time to experience it. We like 5 Little Monkeys mattress because it’s hypoallergenic, durable, and affordable. Try 5 Little Monkeys mattress and find out if it’s the right choice for your kid.

How We Rate Mattresses

We rate mattresses using the following criteria:

  1. Comfort
  2. Structural integrity and durability
  3. Firmness and support

Learn more about our mattress rating process and methodology here.

Psst… the sleep review industry is full of liars, sharks, and thieves. It’s a modern-day version of getting ripped off at your local mattress store. So, why should you trust us?