Adrian, Willett & Mark of Viva La Bike recently post a review of Totobobo mask from Shenzhen, China.
Mark
Adrian

Dustin
After wearing the Totobobo mask, I honestly feel a discernible difference between the Totobobo and other lesser masks I have worn. In short, the bottom line is the way I felt during and after the ride, as well as the before and after shots of the filter. While we do not have access to technology that assesses filter effectiveness on a chemical/molecular level, the mask seemed to perform as it was intended to perform. Overall, the performance was solid, and is an excellent choice for those concerned about air quality.
Pros
Good Seal
Small Shape
Good Fit
Super lite and thin
Thin but very strong strap
Feels durable
Cons
Condensation>Wetness
Intake airflow produces a suction affect on mask
Review Testing Conditions
Air temp 25C, 70-80% humidity
Medium level of pollution report by Hong Kong Air Quality center
Ride-Streets, bike paths and sidewalks of Shenzhen
Observation:
Overall product performance was positive. Wearing the mask was fairly comfortable. The fit was good and it provided a solid seal when sufficient tension was placed on the strap. Inhalation(intake) provided a bit of a challenge as a suction affect occurs. However, during regular riding which requires normal inspiration/expiration, the suction effect is minimal. Exhalation(breathing out) was not an issue at all. Air flow outward tends to flow up through/by the eyes, which has the potential to fog glasses. Condensation within the mask tends to make the seal where the mask contacts the face, a bit sweaty. The positive benefits of the mask, perhaps outweigh a few of the minor nuances associated with wearing a mask that is of higher quality that of the N95 variety. Strictly going off of feeling and smell, when riding the bike while wearing the mask, intake of air simply felt improved. Riding my bike at least twice a day, I can really tell the difference between the way I feel post-ride as well as during. After wearing the Totobobo mask, I honestly feel a discernible difference between the Totobobo and other lesser masks I have worn. In short, the bottom line is the way I felt during and after the ride, as well as the before and after shots of the filter. While we do not have access to technology that assesses filter effectiveness on a chemical/molecular level, the mask seemed to perform as it was intended to perform. Overall, the performance was solid, and is an excellent choice for those concerned about air quality.