As someone with severe evnironmental allergies, being outside in the spring and fall is especially unpleasant. This is very true on day swhen the pollen count is high or when the grass has recently been cut.
Before finding these cloth and reusable ones, I was stuck either suffering fully or using the paper kind you can by in most stores. Even though I would try to get multiple uses out of each mask, I still hated buying them because I hate anything that is not reusable.
These are great. I can go outside on high pollen days and pretty much be okay. Breathing is super easy through them and they are comfortable so I can stay out longer. Since they are washable, I don't feel any guilt since using them once just means washing them and not throwing it away.