99.2% FILTERING 3 PLY MASK - TYPE IIR Medical & Surgical 3 ply face mask. Non woven material, latex free 1st ply, outside 25 gsm water blocking nonwoven 2nd ply, 35 gsm meltblown filter 3rd ply, inside 25 gsm spunbond - ultrasonically welded latex free ear loops - mask size 17.5 x 9.5 cm Technical features: BFE% = 99.2 Differential pressure (Pa/cm2) = 44.1 CfU/g = 24 Splash resistance (kPa) = 21.3 ISO 13485, 93/42/EEC guideline, Norm EN 14683:2019 & ASTM F2100:19, Type IIR