WEST BIKING Summer Sports Scarf Cycling Headwear Dust-proof Cycling Ear-hanging Mask

Features:
With activated carbon filter, effectively prevents harmful substances from entering the nose.
Made of ice silks fabric, cool and breathable, UV resistant.
Level 1: Breathable molding layer: Block larger particles.
Level 2: Activated carbon layer: Adsorption of chemical pollution improve wearing hygiene.
Level 3: Sprayed cotton: Filters smaller 0.30 micron dust.
Level 4: Enhanced filtration of 0.03 micrion PM2.5 particles.
Level 5: Non-woven: Comfortable and breathable.
Hanging ear elastic rope, not easy to fall off.