Instruct: Classify Amazon reviews into positive or negative sentiment
Query: are they genuine Vornado filters?

I ordered these last year, and they came in a packaging clearly marked "Vornado". But this last set was just wrapped in plastic, and they smell so bad I really hope they're not emitting something bad into the air. They are too big for the unit and look different from the old version. Has Vornado changed their item, or is this an off-brand? I will not order from this seller again.