6pcs mouth caps flu with valve sergical cotton personality reusable breathable pm2.5 mask

anti dust mask anti pm2.5 pollution face mouth respirator black breathable valve mask filter 3d mouth cover with filter. description: material: made of sponge, breathable, windproof, sweat-absorption, comfortable and skin-friendly. reusable, economic-friendly and economical. unlike other disposable masks, this mount mask is washable and can be repeated using 3~8 times. not only it doesnt make a harmful effect on the environment, but it is economical. humanized design. ergonomic cut on nos...