The mask is made with 2-ply tricot weaved 100% continuous filament polyester for a soft feel, effortless breathing, and enhanced filtration versus a single layer tricot. These masks are intended to be worn in a on sterile, industrial cleanroom where the goal is to meet the IEST RP CC 3.4* requirement for a "Facial Cover."
Four, 17" bias ties to assure a tighter fit to the face
Pleates expand to fit nose and chin
Bacterial filtration effiency 33% (ASTM F2101) (Average of 5 mask)