2021dustproof valve breathing ship from us sponge facemask mask metal face mask washable reusa sb1k

ship from us dustproof famask breathing valve sponge mask washable reusable anti-dust fog pm2.5 masks.features: material: sponge skin-friendly material makes it feel comfortable when you wear it. double filter: 2 layers thick preventing dust perfectly. its extensible and stronger is not easy to be damaged. widen elastic ear-loop: with stretchy widen ear-band for closely fit, easy to wear and off.