shipblack pm2.5 with breathing dhl anti-haze valve single dustproof facial er masks sponge balaclava face mask for cycl

black anti-haze pm2.5 masks with breathing valve single valve dustproof facial er masks sponge mask for cycling z.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.