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Q. Will Flo Mask fit my child?

Recommended for 4 to 12 years of age. 

Fit was our core pillar from day one. That's why our team invested heavily in utilizing the very best 3D scanning technology to scan elementary aged kids across various ethnicities. As a result, we believe we've created an optimal fit for most kids ages 4 to 12. Our incredibly soft silicone gasket has been engineered to flex and accommodate various face shapes and sizes among this age group. 

Under 4 years of age. 

Although our mask wasn’t designed for kids younger than 4, we’ve had many parents use Flo Mask on kids as young as 2 and the feedback we’ve received is that it fits quite nicely. However, this is a decision a parent must make. To better help you make this decision, our mask dimensions (measuring inside dims from silicone gasket to silicone gasket) are:

Height (nose to chin): 60mm 

Width (sides of mouth): 64mm 



Q. Is Flo Mask N95 certified?

The simple answer is no. NIOSH does not certify kids' masks as N95, so if you ever see any N rating on a kids’ mask, it's a false claim. One main difference between our filter vs. an N95 is that N95 is rated for 8 hours of use in a highly airborne particulate filled environment while maintaining a consistent level of filtration efficiency per OSHA work standards. This typically requires an extra melt blown layer as the first line of defense to capture the dust, but makes it much harder to breathe, which kids would likely struggle with since their lungs aren't strong enough. It also requires a much larger surface area to pass the NIOSH test than the size of our filter as the test is currently designed only for adults.

Therefore, we made the tradeoff of using a highly effective filter from Technostat with unparalleled breathability. As a result, we recommend changing the filter out regularly depending on how poor the air quality is, especially if the filter clogs up and your child has a harder time breathing.

Our Technostat filtration media has been tested in accordance to TSI8130 NaCI 0.1 micron particle size, proving over 97.00% filtration efficiency at 32 LPM with a surface area of 100cm2 .


Q. How often should I change the filter?

The official recommendation from our filter manufacturer is:

Filter rated for 8 hours of continuous use under normal air quality conditions. Replace more frequently in poor air quality environments.

If the mask is worn all day, the easiest rule of thumb is to replace the filter daily. Fresh filters maintain good breathability and when not in use, please store the mask in the microfiber pouch as the filter is electrostatically charged and will continue to attract particulates in the air if left sitting out.

We sell replacement filters in packs of 25. The thought process here is that it’s roughly one pack per month (assumes Monday-Friday daily use).


Q. Can my child wear Flo Mask on a plane?

It’s very important to note that Flo Mask does NOT have an exhaust valve and is a face covering, which complies with the current language of all airline rules. We’ve had many kids fly with Flo Mask without incident. However, since there aren’t any official government approved markings for airline travel and Flo Mask being so unique, on rare occasions, some flight attendants have requested that an additional facial cover be placed over the mask. 


Q. Can you explain how the straps work?

Top Strap

The top strap is fully adjustable and has special silicone strips on the backing to keep the strap from sliding down. On occasion, kids with long fine hair may result in the strap slipping over time. We recommend tying their hair in a ponytail so the top strap rests directly on the ponytail, or wearing a hat can also help keep the strap in place.

Bottom Strap

We elected not to make the bottom strap adjustable as any stitching or buckles can feel uncomfortable against the neck. Also keeping to a single elastic strap helps aid kids in putting on the mask blindly behind their head, ensuring they know which strap is on top vs. bottom.

The elastic is very stretchable and has been tested to 10,000 cycles with less than 0.25 inch stretch. If your child feels the bottom strap is too tight, we’ve included in the box an XL Bottom Strap that can be easily swapped out. 


Q. What is unique about the filter on Flo Mask?

Flo Mask was designed for little lungs, so we focused heavily on the breathability of our filter. This is why we selected Technostat filtration media because they're designed to filter effectively while maintaining a high rate of air flow.

Other filters on the market today have various layers to achieve a high level of filtration and give the mask its shape. However, increased layers also mean increased resistance to air flow. 

Because Flo Mask has its own support structure, we can significantly reduce the number of layers in our filter, down to a single layer that filters sub-micron particles sandwiched in-between a layer of hydrophobic material on each side to ensure the fibers don't get breathed in. This offers maximum breathability without compromising the effectiveness of the filter. 


Q. Does Flo Mask have an exhaust valve?

We made the difficult decision to eliminate an exhaust valve, realizing that many venues (eg. hospitals, airplanes, etc.) now ban such masks due to the pandemic. Therefore, Flo Mask only allows filtered air to flow in and filtered air to flow back out. Maintaining this high level of filtration may result in some condensation build up over time within the mask.


Q. Is the filter recyclable?

Unfortunately, the unique material and manufacturing process to create our filters does not allow it to be recyclable. Please properly dispose of the filter in the trash and remember to always wash your hands with soap after handling a used filter.


Q. Where is Flo Mask made?

One of the most important aspects of Flo Mask, the filter, is manufactured here in the United States. The mask itself is manufactured in China through a highly reputable manufacturer that makes products for some of the most notable brands in the world. All packaging is printed in California and we perform the final assembly here in the San Francisco Bay Area to ship out to you.


Q. Will Flo Mask protect from COVID-19?

Although our filter has been proven to be very effective against standard viruses and bacteria, COVID-19 is novel given there is so much left to learn about this new virus. Therefore, we can't make any guarantees that Flo Mask will fully protect from COVID-19. However, we believe the tight seal of our mask and high performance of our filter can help reduce the risk of transmitting or receiving this virus.