A K&N air filter looks like this:
http://www.knfilters.com/search/product.aspx?Prod=SU-6503
Mine came sealed in a plastic bag (with K&N logos all over it), as well as some stickers to put on the bike (to tell the mechanics that it's a K&N filter, and they shouldn't throw it away at the next service). The filter is somewhat oily, since it uses oil to capture the dust.
http://www.knfilters.com/search/product.aspx?Prod=SU-6503
Mine came sealed in a plastic bag (with K&N logos all over it), as well as some stickers to put on the bike (to tell the mechanics that it's a K&N filter, and they shouldn't throw it away at the next service). The filter is somewhat oily, since it uses oil to capture the dust.