Hygienic triple-layer mask with heat-sealed finish, elastic fastening and adaptable nose clip for a tight fit. Outer and inner layers made of Non-Woven (polypropylene). Intermediate layer in Meltblown (composed of 90% polypropylene and 10% viscose). In compliance with UNE 0064-1:2020 . Bacterial filtration efficiency (BFE) ≥ 95%. Breathability (differential pressure) < 60 Pa/cm2 Non-reusable. 3 Layers. Outside 1: Non-Woven (Polypropylene). Middle Layer: Meltblown (90% Polypropylene/ 10% Viscose). Outside 2: Non-Woven (Polypropylene)