Go to a good paint store...not sure what you have in your area but some
of the stores are Dunn Edwards, Sinclair, Hirshfields, H.I.S., Pioneer,
Benjamin Moore, etc, that only sell paint and professional painting
equipment. I believe you are looking for some sort of carbon filter
cartridge but it has been too long since I painted to remember. Like
someone said, it will tell on the product label what it's for. Get the
particulate filter too, which goes over the carbon cartridge. it will
keep it free of dust and paint spatters so it works better, even if
you're not spraying. Be sure to get a mask that fits good...if it's
too big it will not seal to your face. Also, if you can find it, some
co's make low or no VOC paint that has less toxic solvent etc in it.
(Volatile Organic Compounds=VOC).