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Tested, Certified, Reviewed, Researched, and Patented

We are parents, too, and our babies slept on numu® air™ because it’s the safest crib mattress solution on the market. But you don’t have to take our word for it: multiple independent laboratories have tested the sleep surface and confirmed that it does improve baby sleep safety significantly.

Tested in 2023 by one of the best labs in the USA

When choosing the safest mattress for your baby, focus on four essential qualities; the optimal combination of these attributes will ensure you chose the right mattress:


Airflow (the indrawing of fresh oxygenated air)

CO2 dispersion (unimpeded expiration and clearance of CO2)

Heat dispersion

In 2023, we ran the most extensive testing in an independent laboratory in the USA, specializing in infant product safety. The tests were conducted by Michael Leshner, PE, DFE. We tested our baby sleep surface and compared it to the most popular mattresses marketed as “breathable.”

“In infants, carbon dioxide (CO2) rebreathing can be a serious concern, as their small size and delicate respiratory system make them more susceptible to the effects of elevated CO2 levels. Infants who sleep in an environment with poor ventilation, or who are placed face down on soft surfaces, such as a bed or couch, may be at risk of rebreathing exhaled CO2. This can lead to a condition known as sudden infant death syndrome (SIDS), which is a leading cause of death in infants under the age of one. To reduce the risk of CO2 rebreathing and SIDS, it is recommended that infants sleep on their back on a firm, flat surface, and that their sleeping environment be well-ventilated.”

Michael Leshner, PE, DFE. Chair of the ASTM Ad Hoc Juvenile Product Firmness and Breathability Task Group and expert in infant sleep products.

Firmness Test Passed

The numu® air™ sleeping surface proudly passed the rigorous firmness test for crib mattresses conducted by a U.S Consumer Product Safety Commission accredited lab and by the independent “Baby Breathing Lab”, affirming its compliance with the highest safety standards. 

The certification not only highlights our commitment to safety but also reassures parents that our product offers a secure and supportive sleep environment for their little ones, aligning with CPSIA rules: ASTM F2933-21 and 16 CFR 1241 safety standards for crib mattresses.

happy supine baby on numu air breathable infant mattress with logo of ASTM
graph showing low airflow resistance of numu air and high airflow resistance of average breathable mattress

23 Times Better Airflow

Lower airflow resistance of an infant mattress means more air can be inhaled through the mattress. That’s why we need our newborn mattress to be really breathable. 

However, the word “breathable” is heavily misused in the baby mattress industry. The materials referred to as “breathable” can vary dramatically in terms of the actual, scientifically measured air resistance. In an independent lab, Michael Leshner, PE, DFE. (Chair of the ASTM Ad Hoc Juvenile Product Firmness and Breathability Task Group and expert in infant sleep products)  tested 9 mattresses, including numu® air™, to see which one had the lowest air resistance for a load of 10 newtons (2.54 pounds, which is about the weight of a baby’s head facing down) and at an airflow rate of 2 liters per minute (LPM).

The results are shown below. Numu® air™ remarkably outperforms other mattresses: its air resistance is 0.04, it was ranked the best out of all mattresses tested and its score is 23x lower than the average for the 8 other tested products.

We can conclude with confidence: numu® air™ is the most truly breathable mattress there is.

2.4 Times Better CO2 Dispersion

Exhaled air, rich in CO2 and low in oxygen, can gather around a newborn crib mattress and a baby’s airways during sleep, posing a risk of hypercarbia (excessive CO2 in the blood) and hypoxemia (insufficient oxygen in the blood). These conditions are serious and potentially fatal, with CO2 rebreathing considered a key risk factor for Sudden Infant Death Syndrome (SIDS). It’s crucial for the area around the baby’s face to have as much CO2 dispersed as possible, reducing rebreathing to keep CO2 levels low.

In an independent lab test by Michael Leshner, PE, DFE. comparing 9 baby mattresses, including numu® air™ the findings were clear: numu® air™ allowed only 5.57% of CO2 to be rebreathed, it is ranked the best out of all mattresses tested and its score is by 2.4x better than the average of the 8 other products tested (13.54%).

This highlights numu® air™’s superior ability to maintain a safer breathing environment for babies, minimizing the risk associated with CO2 rebreathing.

graph showing low rebreathing rate of numu air and high rebreathing rate of average breathable mattress
graph showing low temperature of numu air and high temperature of vinyl mattress to demonstrate effective heat dispersion

Materially Reduces Overheating

Overheating is another major issue in baby sleep safety. The sleeping environment, including the baby’s clothes, covers, and the material that the breathable crib mattress is made of, can prevent heat from dispersing naturally. It can make the baby’s temperature increase, which creates a hazard.

To find out how temperature is retained on numu® air™ and on a standard vinyl-covered mattress,  in an independent lab, Michael Leshner, PE, DFE. had a water-filled dummy connected to a heater tested under lab conditions.

It was clearly shown that, on numu® air™, the temperature of the water dummy representing a sleeping baby was 98.37 °F (36.87 °C), and on a vinyl mattress, it was 103.3 °F (39.56 °C). This difference of 5°F degrees can be very dangerous for a baby’s body. When covered with a duvet (which is not recommended), the dummy temperature was 107.17 °F (41.76 °C) on numu® air™ and 117.07 °F (47.26 °C), which makes a stunning difference of almost 6°F.

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Certified and meets all required standards

numu® air™ doesn't just meet but exceeds the most stringent safety benchmarks. It's been rigorously tested and certified across various nations, ensuring it upholds the highest standards for your little one's well-being. This commitment to unparalleled safety provides parents with profound peace of mind, knowing their baby sleeps on a surface that's been certified in the US and several other countries.

greenguard gold certified crib mattress

numu® air™ is UL Greenguard Gold Certified for low chemical emissions

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As tested by a U.S Consumer Product Safety Commission accredited lab

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Passed the VAG-006 CO2 rebreathing test and AS/NZS 8811.1-2013 firmness test 

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Meets the standards of the Infant & Nursery Products Alliance of Australia

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Meets the standards for crib mattress in Australia

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numu® air™ sheets and comfort layer were tested for harmful substances by OEKO-TEX®

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Reviewed and cited by the best medical journals

numu® air™ was cited by the esteemed American Academy of Pediatrics (AAP) and featured in the Pediatric Pulmonology journal, showcasing its remarkable design and safety. These acknowledgments underline its effectiveness in promoting safer sleep environments for infants, rooted in comprehensive scientific evaluations. These reviews affirm numu® air™ as a pioneering choice for parents seeking evidence-backed, respiratory-friendly sleeping solutions for their babies.

logo of American Academy of Pediatrics

Certain crib mattresses have been designed with air-permeable materials to reduce rebreathing of expired gases , in the event that an infant ends up in the prone position during sleep, and these may be preferable to those with airimpermeable materials With the use of a head box model, Bar-Yishay et al found that a permeable sleeping surface exhibited significantly better aeration properties in dispersing carbon dioxide and in preventing its accumulation. They also found the measured temperature within the head box to be substantially lower with the more permeable mattress, concluding that it was due to faster heat dissipation. This finding could be potentially protective against overheating, which has been identified as a risk factor for SIDS.

The American Academy of Pediatrics (AAP) is the largest professional association of pediatricians in the United States. The AAP publishes policy statements, ranging from advocacy issues to practice recommendations with respect to infant and children health and safety.

Following the study examining airflow, which was published in Pediatric Pulmonology, “Aeration properties of a new sleep surface for infants”, 2011. Two of its most important characteristics, the use of air permeable materials (like the net of numu® air™) and the ability for heat dissipation, were positively mentioned in the review on “SIDS and Other Sleep-Related Infant Deaths: Updated 2016 Recommendations for a Safe Infant Sleeping Environment.” Policy Statement: Task Force on Sudden Infant Death Syndrome, American Academy of Pediatrics, under the heading “Commercial Devices.”

logo of Pediatric Pulmonology

The leading hypothesis that explains significant risk factors for SIDS in the sleeping environment is the rebreathing hypothesis…. we re-introduced here an infant sleeping surface which is made of permeable netting (referring to numu air) thus allowing free air movement through it. The special characteristics of aeration, ventilation, and resistive properties, aimed to decrease the likelihood of significant CO2 rebreathing, may decrease important risk factors for SIDS.

Pediatric Pulmonology is a medical journal that focuses on respiratory health in children. The journal featured a pivotal study in 2011 that examined a new infant sleep surface known today as numu® air™, initially referred to as ‘Net’. This innovation was tested for its potential to mitigate Sudden Infant Death Syndrome (SIDS) risks by improving aeration, a critical factor in safe infant sleep environments.

The researchers conducted experiments to compare the ‘Net’ (numu® air™) against other mattresses, measuring how well it could disperse and prevent the accumulation of CO2, which infants could potentially rebreathe — a significant risk factor for SIDS. The numu® air™ demonstrated superior performance, dispersing CO2 more quickly and reducing its accumulation substantially, even when covered with a sheet.

These findings underscore the numu® air™ as a noteworthy advancement in infant sleep safety, aligning with the American Academy of Pediatrics’ guidelines for reducing SIDS risks. This surface stands out as a beacon of innovation, possibly offering parents and healthcare providers a more effective means of safeguarding infants during sleep by tackling the critical issue of CO2 rebreathing.

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Researched in two hospitals

numu® air™ has been studied in medical research facilities, with studies focusing on its innovative airflow design and ability to create a safer sleeping environment. These studies confirm numu® air™’s effectiveness in allowing free airflow, significantly reducing CO2 accumulation, and preventing dust mite survival on the sleeping surface. Such evidence highlights numu® air™ as a leader in promoting healthful sleep for infants, outperforming standard and marketed “breathable” mattresses in crucial safety aspects.

big logo of Hadassah University Medical Center

A physiological study aimed at assessing airflow through the mattress surface was conducted by Dr. Ephraim Bar-Yishay in the Pulmonary Laboratory at Hadassah Hospital, Jerusalem, Israel. The findings highlighted that the meshed netting design allowed for free airflow with minimal resistance, significantly reducing the accumulation of carbon dioxide (CO2).

In a parasitological study led by Dr. Kosta Mumcuoglu in the Parasitology Laboratory at Hadassah Hospital, Jerusalem, Israel, the focus was on evaluating the mattress surface’s ability to prevent house dust mite survival. The results unequivocally demonstrated that the new netting material completely inhibited dust mite survival, a stark contrast to conventional mattresses that not only allow dust mites to survive but also to reproduce.

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Another physiological study compared the airflow through numu® against four infant mattresses marketed to prevent prone rebreathing, as well as one standard infant mattress. Conducted by Dr. Mark Gaides and Dr. Ephraim Bar-Yishay in the Pulmonary Laboratory at Sheba Medical Center, Tel Hashomer, Israel, the study revealed that numu® air™ facilitated free airflow, showcasing a rapid CO2 elimination rate that prevents its accumulation. Impressively, these characteristics were significantly superior to those observed in all other tested mattresses.

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numu® air™ proudly holds US Patent No. US 9554 655 B2, recognizing its unique, innovative design that sets a new standard in infant sleep comfort and safety.

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Be a Responsible Parent

Explore all 6 reasons why to buy your baby a numu® air™ surface instead of a mattress:

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Because Safety Matters

numu® air™ is aimed at reducing SIDS risk factors. Feel safer, even if your baby turns over to sleep on their stomach

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Because Baby Health Is Important

Our sleep surface reduces the risks associated with allergies and asthma. It’s also free of harmful substances

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Because Sleep Quality Is Crucial

The net provides air circulation and fluid permeability, which means a dryer sleep for your newborn

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Because there’s deep science behind it

numu® air’s breathability and safety were researched, tested, reviewed, certified, and patented

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Because It's So Easy to Use and to Clean

As a parent, you will definitely appreciate the zero-effort use and cleaning of the numu® air™ sleep surface

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Because You're a Responsible Parent

You agree to embrace the new standard for breathable mattresses, when choosing numu® air™

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No Harmful Substances

At numu® air™, we prioritize the well-being of your little one above everything. That’s why our breathable sleeping surface proudly boasts the UL Greenguard Gold certification, surpassing even the strict standards set by the US government. This certification is our badge of honor, symbolizing our commitment to providing the safest sleeping environment.

Recyclable Materials

numu® air™ isn’t just about giving your tiny dreamer a safe spot to snooze; it’s about loving our planet, too. From packaging to the product, numu® air™ embodies sustainability. Fully recyclable, it represents a choice for eco-conscious families, marrying quality with environmental stewardship.

numu air amazon crib mattress with greenguard certification confirmed

numu® air™ is UL Greenguard Gold Certified for low chemical emissions