I'm glad i bought these. I oiled them up and they stretched over the stock filter great and have held up. When one gets a little dirty just put a different one on, and the main air filter looks like new still
Makes washing my bike easy and worry free. The seal around the cover isn't perfect, that's why i didn't give it 5 stars.
I still put a paper towel underneath the cover just to be safe, but it has not gotten wet yet.
I like the idea of a cleanable air filter. Appears to filter bettter than the stock unit and a cost savings if you get a few years out of it. This is pretty much the industry standard for foam air filters.