Nosk is comfortable to wear and is almost invisible. It is easy to wear and remove. It is meant for teenagers, adults & elderly people.
Its ultra fine filter with SMS technology (Spunbond, Meltblown, Spunbond) consists of 3 layers to filter even the finest of particles.
An average adult drinks 2-3 liters of water in a day whereas he/she breathes in more than 5 litres of air per minute! (wikipedia article- tidal volume).
If we use a water filter at home then isn’t it high time to use a pollution mask, at least in those bad air days?