I commute five miles each way per day in London, and am getting fed up of inhaling lung-fulls of sooty exhaust fumes from buses, lorries and other road vehicles. I'm thinking of getting a pollution filter mask, but have heard contradictory reviews, some saying they are great, others saying the masks don't filter out the smallest (most dangerous) particles, and restrict breathing.

What are peoples experience of these masks? Asthmatics who find they alleviate their problems? People who say their breathing is restricted? All sides of the story wanted!!

Moog