Cone Style with Valve PFE>95% BFE>95% Ø Three layers, each layer ... environments, fit for long 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%