Clean Air!!! went to the dr. the other day with a sore throat and he said alot of it was from particals from riding the bike... you nose is not good enough filter for the dust and trash that is in the air on a roadway,,, your engine has an airfilter you need an airfilter he said... so im looking for something a little fashionable to wear other than a blue or white mask... i hope this helps me in the future and that little damage is done to my throat and lungs...