For Air Purifier A2 Filter Pack:

A2 PuriPRO® Filter Pack  Humidifying Replacement Filter Pack
Includes:
1 x PuriPRO^® 4-in-1 Filter (Pre-Filter Cool Catalyst Granular Activated Carbon H13 HEPA Filter)
1 x Humidifying Filter

A2 PuriPRO® Filter Pack
Includes:
1 x PuriPRO^® 4-in-1 Filter (Pre-Filter Cool Catalyst Granular Activated Carbon H13 HEPA Filter)

Humidifying Replacement Filter Pack
Includes:
1 x Humidifying Filter