the story:
i do cleaning mainley useing a petol powered vac, this job get me verry dirty i.e we are useing the wrong weather bag so dirt is flying every where in dry weather, the safty goggles we got let dirt in and is going up my teir ducts so i thorght well dirt bikers get more dirty then me and my job so i'l go down the local bike shop and see what they got, £25 and a pair of thor goggles later the teir duct problem has gone, now i need a mask to stop dirt going in my mouth and up my nose (also to stop every one complaining and loling at me after my job)

the question
what dirt bike mask would be good for this ? the last one i had was a paper filter one and i almost gaged becaues i could not breath.