Every Performance Sports mask is equipped with 1 filter. The mask filter is recommended to be replaced once every 30 days. You can adjust the time yourself by using frequent and heavy haze.
The mask with the breathing valve greatly reduces the sultry feeling, the double breathing valve does not leave the hot air, the glasses do not fog, and the particles are more than 99% blocked.
Applicable: Cycling /Running /Skiing /Training /Outdoor sports/Basketball
Function: Dustproof /Windproof /Anti-Virus /Anti-Smog /Anti-PM2.5
Condition: 100% brand new
Material: superfine fiber/mesh
Size: as picture
Function: dust-proof, wind-proof
Package Includes: 10Pcs masks pack