Thanks to Al Castillo from Manila, we got this cool picture from him: ”Based on the color of the filters which I used only for a day, it filters well.”
Al is part of the Tiklop Society of the Philippines, Tiklop- meaning folding, TSP is a folding bike riding group. On the 7th of August the group was riding from Manila to Bulacan, an 80km ride! Al didn’t need to use the mask for the entire trip, possible only use it for half of the trip where the air pollution is more apparent.
more about the Bulacan ride
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Philippines: Cool picture of SuperCool
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Buy TOTOBOBO mask
How long does the filter last?