Originally Posted by CPRFAB
The foam part of the top of the filter can touch the bottom of the seat pan a little. Not often but sometimes the red plastic upper ring will barely touch. It has never been an issue and nothing really becomes of it. The very first one we made is still in service on our test bike and it shows no real signs of wear.
OK just noticed last time I had the seat off I had rubbed a small home in one of the white throw away filter skins