Cone Style with Valve PFE>95% BFE>95% Ø Three layers, each ... time wearingØ Face shape design(cone style), cool head straps for comfortable wearingØ Suitable to textile, mining, construction, electronic, food processing, cement ... , disintegration, agriculture, farm garden, glass, cleaning, etc. workshopsØ PFE>95%Ø BFE>95% N95 Cone Style ...