How to customize TOTOBOBO mask to fit small face?

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

Predictive value of the user seal check (of normal N95/N99 mask)

Document title
Predictive value of the user seal check in determining half-face respirator fit


DERRICK J. L. (1) ; CHAN Y. F. (1) ; GOMERSALL C. D. (1) ; LUI S. F. (2) ;

Author(s) Affiliation(s)
(1) Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, HONG-KONG
(2) Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, HONG-KONG
Résumé / Abstract

Guidelines issued by the Centers for Disease Control and Prevention and the World Health Organization state that healthcare workers should wear N95 masks or higher-level protection during all contact with suspected cases of severe acute respiratory syndrome. Before use, the manufacturer recommends performing a user seal check to ensure that the mask is fitted correctly. This study aimed to test the ability of the user seal check to detect poorly fitting masks. This study is a retrospective review of a mask-fitting programme carried out in the intensive care unit of the Prince of Wales Hospital in Hong Kong. In this programme, all staff were tested with two types of N95 mask and one type of N100 mask. The results of the documented user seal check were then compared with the formal fit-test results from a PortaCount. Using a PortaCount reading of 100 as the criterion for a correctly fitted mask, the user seal check wrongly indicated that the mask fitted on 18-31% of occasions, and wrongly indicated that it did not fit on 21-40% of occasions. These data indicate that the user seal check should not be used as a surrogate fit test. Its usefulness as a pre-use test must also be questioned.

Revue / Journal Title
The Journal of hospital infection ISSN 0195-6701


Defeative mask recall

If you purchase a TOTOBOBO mask between September 1st~17th from this site, please check if you have received a defective mask. The problem is the whole filter tend to fall off very easily. It is easy to check: refer to the photo here: try to open up the mask by graping both filters, the mask should be opened without the filter dropping off. If the filter detached from the mask without much force, then the mask is defective. Please contact totobobomask (at) gmail . com to arrange for replacement mask.

We’ve taken immediate steps to correct this problem. Masks purchased after September 17 are free from such defect.

We apologize for the inconvenience caused.

checking if TOTOBOBO mask is defective

Checking if TOTOBOBO mask is defective (view from bottom of the mask)

TOTOBOBO mask in NIOSH site

Totobobo mask was spotted in NIOSH NO-FIT-TEST workshop page    Totobobo mask was spotted in NIOSH NO-FIT-TEST workshop page

I was surpriced when my friend show me this page in CDC site. NIOSH, the National Institute of Occupational Safety and Health under CDC, is the US organization who certify the well known N95 mask. What made TOTOBOBO, a little known Singapore invention of respirator mask, appears in this heavy weight website?

No, TOTOBOBO is not certified by NIOSH, at least not yet. The picture of an early version of TOTOBOBO mask found in the NIOSH website is to serve as an inspirational example for a “No Fit Test” filtering facepiece respirator workshop. The workshop will be conducted in Nov. 6 later this year and the objective is:

“To better understand the interdisciplinary research needs and challenges in developing and certifying a universal “no-fit-test” filtering-facepiece respirator”

I think this is totally appropriate and it shows NIOSH recgonize the need to improve the current procedure in order to motivate manufacturers to innovate toward the direction of “No fit test” respirator. 

Why is this big fuss about “No fit Test”?

If you read carefully the fine text of your respirator instruction, you will notice a statement similar to this:

“Before use of this respirator, a written respiratory protection program must be implemented meeting all the requirements of OSHA 29 CFR 1910,134 such as training, fit testing, medical evaluation, and applicable OSHA substance specific standards.” 

The simple fact is, the rated protection value will be drastically reduced if the mask does not fit your face, and there is no other ways to tell except by doing a fit-test. Buying a mask is easy, but getting a mask fit-tested on each individual is a challenge. In emergency situation like flu pandemic or haze outbreak, it is simply not possible to get everyone a fit tested at once. 

One can start to sense the “pain of fit test” and how touchy this issue is from the following comment in one of the NIOSH science blog :


NIOSH debate how often to fit test

NIOSH debate how often to fit tes

Hopeful to see Fit-Test to be lifted– Edward Hernandez, City of Hialeah, Fire Rescue says:- Thank you for proposing a study as this. For a while now this OSHA (Fit-test) requirement  has been a burden to our Fire/EMS service.

Hopeful to see Fit Test to be simplified-Peggie Reinhardt, RN BSN, says:

I would be interested in this study, we currently fit test our employees annually. If this process could be shortened or redesigned so that it was easier to do would help tremendously.

Fighting to keep Fit-Test in organization– Sgt. Julie Love says:

I would be interested in being part of this study on the law enforcement side. We fit test our officers annually but many departments do not. Law Enforcment traditionally has fallen down in this area as many agencies just give their officers their masks without any fit testing. We also fight the battle with our management with what is mandated.

Worry that No-Fit-Test= Not Safe-Kevin MacDonald says:

 I am concerned that changing the fit test frequency while cost effective may defeat its overall purpose. when fit testing went from every 6 months to one year as a requirement of OSHA it was a step back.

Confused and concern-Kelly Russell says:

I am glad this study is being done. Respiratory fit testing is expensive for employers and it will be good to have a current answer when asked why we have to do the testing so often….or maybe not so often as the case may be.


No matter what, the setting up of this workshop itself is already a breakthrough, and we are definitively happy to be associate with the solution side of the problem. We hope the result of the workshop will bring more practical innovation into the design and certification of respirator, especially taking people like housewife and children who don’t have access to fit-test equipment but also deserved to have good protection when situation come.