Product review (5 stars): Easy replacement once a year
It's the Honeywell brand pad and not a generic replacement. Comes sealed in plastic. It's just the metal humidifier pad in a cardboard box. Will take you all of 60 seconds to exchange out your cruddy mineral residue caked one with a clean one:

1. Remove humidifier pad housing from the humidifier
2. Open the top plastic cover from the housing
3. Remove old pad
4. Replace with new pad
5. Replace cover
6. Place housing back into humidifier.

Easy as pie.