I may be presumptuous to assess the filters after one week in the ceiling, but, they have come wrapped in plastic covering which is a plus, and the filter will remain in the ceiling feeling benign neglect for 30 days, my usual "change the diaper time".
Helped my Texas sized allergies! I live in Dallas Texas where the air quality has gotten really bad and even inside our home I've noticed that it has not been conducive to reducing allergy symptoms. We started using this new filter and it has made such a difference I was absolutely shocked a highly recommend them