In canada I’ve seen people biking, and even working out at a gym using half mask respirators with cartridges. I have one for doing certain kinds of work, but they are easily breathable and very lightweight. Just get a cartridge/filter for pm2.5 p100. Your face will sweat, but your lungs will thank you. They’ll be more and more necessary in the future anyway.
In canada I’ve seen people biking, and even working out at a gym using half mask respirators with cartridges. I have one for doing certain kinds of work, but they are easily breathable and very lightweight. Just get a cartridge/filter for pm2.5 p100. Your face will sweat, but your lungs will thank you. They’ll be more and more necessary in the future anyway.