Product review (1 stars): DO NOT BUY
I'm not sure how Amazon can continue to sell an item where so many customers do not receive the item pictured. I too received a filter with no blue pre-filter.  At first I assumed it wouldn't make that much of a difference, but after two weeks this filter is already growing mold. This seems like a significant health risk. I used the filter that came with my himidifier all Winter last year with no mold (had a blue pre-filter). I tossed it at the end of the season as the humidifier suggested. I never would have done so had I known that it would be impossible to replace that filter with an identical filter. They do not seem to be available at all anymore, even directly from the manufacturer. I never would have purchased that humidifier if I had known I would never be able to find quality replacement filters.

This did appear to be a genuine Honeywell replacement filter. It's just not the same as the one that came with my original humidifier. Not worth the money. Waste of time, effort, and money. I cannot afford to spend 15 bucks on a new filter every two weeks. I do NOT recommend this product.