Testing Totobobo mask against N95 mask

Totobobo mask is the most comfortable and advanced respirator in the non-certified respirator market. In many respects the patented design is revolutionary. The original design cater to the needs of common users, who do not have access to professional fit-test facility and yet need the assurance of a well fitted respirator.

preparing Totobobo mask for test
Preparing Totobobo masks for test

A different approach
To provide assurance of good fit, we made the reusable mask with transparent plastic, so that users can see through it and check the face-seal. We make the mask customizable, so that users can trim it to fit their face. The thin and flexible plastic is highly adaptive and easily follows the contour of the face, require very little force to hold on to the face. The strap is exceptionally flexible and comfortable to use. There is silver ion anti-virus additive in the mask to make reuse more safe. all these sounds great on paper, but how does it perform in real life?

testing Totobobo mask
Testing Totobobo mask

Testing the masks
To validate the protection of Totobobo, we sent the masks to the Prince of Wales Hospital in Hong Kong to test the effectiveness by professional fit-test facilities.
A randomized controlled cross over study was carreid out to compare the efficacy of Totobobo with fitted tested N95 masks (1860 or 1860s or 1862, 3M). The test was conducted in 22 healthy volunteers. The key findings are:

– The pass rate (filtration factor >100) of Totobobo mask was over 73%, while majority of (N95) masks fitting less than 40% of the test population
– The average filtration factor of fitted tested N95 masks is higher (193) then Totobobo mask (135).
– In terms of comfort, 65% subjects preferred Totobobo mask over their fitted tested N95 masks

Quote from the report:

“..Using the Totobobo mask in the panel of masks to be tested may reduce the number of masks that need to be tested before an adequate fit is found. This potential advantage, however, will need to be balanced against the time taken to trim the Totobobo mask to size. Furthermore, in situations where there is insufficient time to carry out fit testing use of the Totobobo mask may be a useful stopgap measure. In addition to this, the fact that the Totobobo mask is designed to be reusable may provide significant advantage. This would minimize the problems associated with the need to stockpile disposable masks and the difficulty of obtaining supplies in an epidemic. However, prior to concluding the mask is re-usable it is necessary to test the effect of sterilization processes on the mask. It is conceivable that such processes may make the mask less pliable and the fit less good. Moreover it is important to ensure that the process of changing the HEPA filters does not contaminate the user with infectious particles.

In terms of comfort 65% of subjects preferred the Totobobo mask over the N95 mask (1860, 1860s 3M). While the confidence interval straddles 50% this may be due to our small sample size. Comfort is an important issue when masks need to be worn for long periods of time. Greater comfort may translate into greater compliance with proper use of the mask and hence greater protection in clinical use. The experience of our ICU during SARS suggests that compliance is an important factor in determining the risk of occupational infection.”

The bottom line
If your have access to fit-test facility and have time to conduct fit test, the best option is fit-tested N95 mask. Otherwise, Totobobo mask provides reasonable good protection even if you don’t have access to fit-test facility or there is no time for fit test.

fit-test result from one of the subject
fit-test result from one of the subject

A randomized controlled pilot study to compare filtration factor of a novel non fit tested HEPA filtering facemask with a fit-tested N95 mask.
by Dr Sylvia S.W. Au, Dr Charles D. Gomersall, Patricia Leung and Dr Peggy T.Y. Li.
Dept of Anaesthesia & Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong.

How do I know if Totobobo will fit?

Side by side: Totobobo mask and simulator
Side by side: Totobobo mask and simulator

Face mask fitting is a personal issue. Even a certain mask fit many people, it doesn’t mean that it will fit you. Just like buying a pair of shoes, you can’t really tell until you actually put it on and try.

But unlike buying a pair of shoes, no one will let you try a new mask unless you have bought it. Once you open the pack, you can not return the product because of obvious hygiene reason.

Some company make a business out of this problem and sell a set of “sampler masks” which contains a number of different models so that you can try them. The idea is the mask samples allow you to try them one by one and identify the most suitable so that you only need to order that model in the future. But whether you found one or not, you will have to fork out the money and pay for the set of “samplers”.

We decided to do it differently. We create a downloadable paper dummy which we call it “Totobobo simulator”. The simulator is a full size dummy of the actual Totobobo mask, very easy to put together. Although it does not have filter and does not work as a filtering mask. It is possible to use this simulator to test if the actual product will fit your face size or not.

Even more, you can trim the simulator, just as cutting the actual mask to check how it can fit better for smaller faces. It is especially useful for people who do not want to damage their mask unnecessary.

This is a concern we heard some times: “How do I know it will fit better after cutting the mask smaller?” You are worried that cutting too much, the mask can never go back to the original size.

No need to worry any more,??just download the “Totobobo mask simulator“, print as many copies as you need, experiment different sizes and see which one fits the best.

Here is a few step by step illustration:

1st step: cut it out
1st step: cut it out
2nd step: fold it
2nd step: fold it
3rd step: join the edge
3rd step: join the edge

After three simple steps, you have your very own simulator!

Now is the time to have fun testing the fit. If it is too big, just cut it smaller. ?If you cut it too small, just make another one!

The position of the lines are comparable to the real thing, you can follow the lines to get M,S or XS sizes, or even any size in between.

However, a simulator is not the real thing. Especially around the nose bridge area, the paper simulator is flat and the real Totobobo mask has a 3D curved profile which fit human face better.

Testing the size
Testing the size
Simulators cut to different sizes for test
Simulators cut to different sizes for test



Download the file: http://totobobo.com/download/Totobobo-mask-simulator.pdf

Get the real mask:

Buy Totobobo mask

How to customize TOTOBOBO mask to fit small face?

One of the unique feature of TOTOBOBO mask is “Cut to size”. The original mask fit most adults except small faces of female and children. If you need to fit the mask to your 5 years old child, it is possible by just following the simple steps illustrated here:

TOTOBOBO mask can be cut to size
TOTOBOBO mask can be cut to size

The TOTOBOBO mask is the world’s first customizable respirator. Other products are only available in a particular size that only fits a particular age range and facial structure. For everyone else, there is little else that can be done.
TOTOBOBO, on the other hand, is capable of being trimmed to fit a wide range of facial sizes for optimal comfort and filtering. The mask fits most adults and can be modified to fit children as young as 5 years old. TOTOBOBO is the most versatile protective mask on the market. Adjusting the mask’s size is simple, just follow these steps:

Note: Use a pair of clean and sharp scissors. Wash your hands before starting.

You first need to determine how small you want to trim the mask. You can make a quick estimate by covering the mask on the user’s face, or better yet, get a TOTOBOBO dummy mask set. If you are not sure about the accurate size, I suggest you to trim the mask one ring at a time. The mask should form a snug fit to the face, but not so tight as to be uncomfortable. Take this into account when trimming the mask. Remember: measure twice, cut once.
You then carefully cut the material of the mask starting from the bottom. Inserting the scissors, follow the curvature of the mask along one of the ridges as you cut and make a complete loop. Trim any excess for comfort and test size as necessary. The excess material can be disposed of, and the mask is ready for use.

Once the mask is cut to fit the desired size, it is ready for repeated, long term protection.

Step 1 - start the cut from the bottom of the mask
1 - start the cut from the bottom of the mask
Step 2 - insert the scissors into one size of the opening
2 - insert the scissors into one side of the opening
Step 4 - turning around to the other side
6 - almost done
4 - make a loop to the starting point
7 - see! you've got your small mask now
5 - see! you've got your small mask now


Test the cut with a Totobobo mask simulator

Buy Totobobo mask