Features :
The cover: can long term use.
The main part respirater filter: can be washed and long term use.
Filter cotton: about 40 hours/piece.
Filter carbon box:about 200 hours/piec
Specification :
Material: MPE
Color: Black
Model: 9578
Package Includes :
1 x 9578 Face Mask
2 x Particulate Cotton Filter
1 x Filter Cover
