How do you know what pollution mask is most effective for smoke and other harmful particulates? Puraka Clean Air Resources' Pollution Mask Calculator shows you exactly what filter (N95, N99, etc.) and "fit factor" are optimal for the current air quality.
When the air quality exceeds your unique tolerance (based on health and age) Puraka sends an SMS alert to tell you to wear a pollution mask. Algorithms keep track of how many n95 filters you're using, and a fulfillment service mails you new ones automatically.
