Product review (2 stars): They look like what came with the humidifier but don't last as ...
They look like what came with the humidifier but don't last as long.  The original Holmes "W" Filters that came with the unit lasted for ~10-11 weeks... but these barely made it one month.  Nothing changed in my usage.  Makes the Wemo very expensive to operate.  I use conditioned water that is filtered and add Holmes Humidifier Bacteriostat... but still got ~4 weeks out of these.  Not terrible but far from good.  Disappointed for sure.