Comment by jerlam
11 hours ago
There's an Airfanta 4Lite which uses laminar flow to achieve that:
https://air-fanta.com/products/airfanta-4lite
However, testing seems to show that the clean air flow is neither wide nor far; it would only be effective right next to your face and you can't really move:
https://www.reddit.com/r/Masks4All/comments/1di1n4t/can_a_po...
There aren't a lot of use cases for it.
My aunt is immunocompromised and carries one around with her in crowded situations, keeping it pointed right at her face 8-12in away. It works well for her, especially since she's had a lung transplant and doesn't do well with a mask.