Brand new!  I opened the box to confirm the condition!!

The Honeywell 24000 (28500) Replacement True HEPA Filter is a genuine product designed for air cleaners. It features a HEPA Filter Ring with a MERV rating of 16 and a filtration technology of True HEPA. The filter media is made of carbon and has a filter life of up to 3 years. The product comes in white and is manufactured in the United States.