100 шт антипылевой pm 2.5 активированный угольный фильтр 5 слоев сменные анти дымовые фильтры для респиратора рта

economical package - 100 pcs pm2.5 activated carbon mask filter in all. you can use those pm2.5 mask filter in a long time. mask filter has 5 layers of protection, bringing you a safe breathing experience. the mask filter provide comfortable protection for people.suggest replace the fliters every week of uses for the best effect.