Product review (1 stars): Do not buy
This replacement filter is absolute junk.  My Holmes Humidifier HM2608 came with a "permanent" filter.  With monthly cleaning, that permanent filter  lasted for for over 5 years before it would no longer wick water.  Unfortunately, Holmes no longer makes a permanent filter.  They now sell this paper garbage.  In 2 weeks, it smelled of must and mildew.  I cleaned the filter as instructed, only to have the smell come back in 1 week.  After 3 more cleanings, the filter lost its shape and will no longer stand upright in my humidifier.  The whole filter is cheaply glued together with what looks to be a single line from a hot glue gun.  That seam failed.  The black mesh wrap is also paper and non-structural.

After closer inspection of the details on the Holmes website, I see that it is recommended to be replaced after only 2 weeks.  I suppose my 5 week life is extraordinary for the product.  However, I do not appreciate wasteful junk that needs constant replacement.  Thanks to these ridiculously short-lifed filters and lack of support from Holmes, my humidifier will be replaced.