You don't ever actually need a filter though. I can roll joints or blunts with or without filters that won't shit in your mouth and you can always get a hit through. The filter tips are good I guess if you want to smoke it til it's gone, but you usually get some kind of wierd taste and it's just an extra step that takes up time. I smoked with some scotsman that was rolling spliffs with roaches, and was amazed by my roachless joint.