I have been using these filters and sport masks for my martial arts gym. They have been breathable and comfortable enough that I have been able to use one mask for the entire class; I had to have at least two of my old style masks to switch out when they got too saturated. These stay away from the mouth and I feel I have as good of a seal as I can get from a sport mask. Nobody can properly wear a surgical mask for an entire martial arts class, and real N95s get soggy quick. These are a good balance of protection and comfort imo.