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Fit testing Totobobo mask with 5.5 years old

Happy Lucas wearing a well fitted Totobobo mask

Happy Lucas wearing a well fitted Totobobo mask

Conducting a fit-test with Lucas

Conducting a fit-test with Lucas

Lucas is the youngest fit-tester ever tested by our Portacount Pro fit-tester machine so far!

Lucas was born in the year of rat 2008, making him 5 years 6 months old when he visited us for a fit-test. Not long ago Yixuan, Lucas’ mother, send us a photo of Lucas wearing a Totobobo mask and explained that she couldn’t get it to fit him perfect enough. After checking the photo it is obvious that the mask was too big for Lucas. I offered to to conduct a fit-test help to customize the mask for the little boy.

At first the mask was too big for Lucas..

Help! Lucas’ Totobobo mask is way too big. Large gaps can be seen below the chin and around the nose bridge. Photo credit: Yixuan

Lucas’ mum told us he is a very active boy and makes friends easily with both adults and peers. It was fun to have Lucas since he is very playful and active. However the fit-test part was a bit challenging since Lucas has to keep still and perform certain specific action, such as deep breathing, moving the head steadily side to side and up-and-down. The most difficult action turn out to be “breathing normally”, (that sounds so boring for Lucas) and the easiest was “Talking loudly”.

Optimized Totobobo mask after the fit test

Optimized Totobobo mask after the fit test

We were unable to obtain an uninterrupted routine to pass overall “Fit-factor” of 100. On the other hand, although the result during “Normal breathing” was a poor 20, incidental results of over 100 means that it is possible for Totobobo mask to achieve N95 level performance on a 5 and a half years old. For example, during the task “Head side to side” the fit factor was 107, and another task “Head Up and Down” the fit factor was beyond 200!

Partial result during the fit test

Partial result during the fit test

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