once again this thread has proven what happens when you assume........ make an ass out of yourself . lol
I should have read the whole thread before replaying to the OP.
nah - your assumption was very reasonable - oiled foam filters is what we are all accustomed to coming from K&N so thats what we expect.
These home filters dont look like foam to me, not sure what it is, but its some type of material and pleated in the same manner as a paper filter - - cant really tell you much more when I got mine I didnt spend a great deal of time inspecting it, just unwrapped it and installed it - - like I said above it seemed very well made, I will have to inspect it more closely when I pull it out to clean it