don’t know where to start? here are some brands that i like (+a vid of me wearin some, for a visual):
•Bonafide Masks
•WellBefore
•Dräger
•BeHealthy
•Laianzhi
•Breatheteq
•BNX
•3M
•MaskC
•CambridgeMask
*buying directly from distributors (some use amazon)=best way to avoid less than quality product