When you wear the AirZ Reusable Mask, you can control how fast air flows through it. In fact, this reusable mask offers three different active airflow speeds. Designed with a built-in fan, it allows you to breathe air only after it goes through five layers of protective filter. Not only will you breathe clean air, but you will also avoid sweat and fog inside this mask. Even if you’re exercising, the AirZ ensures you breathe easily. Designed to meet PFE..